usical instruments and acoustics (G10)

G   Physics(387028)
G10            usical instruments; acoustics(2822)
Noise absorbing wall panel // 2607484
FIELD: acoustics.SUBSTANCE: invention relates to industrial acoustics, specifically to noise absorbing wall panel. Noise absorbing wall panel has smooth and perforated surfaces, between which complex shaped combined sound-absorbing layer is arranged. Latter represents alternating solid sections and hollow sections. Framework is made of rigid sound-absorbing material. Hollow sections are formed by prismatic surfaces, having in cross section, parallel to drawing plane, parallelogram shape, which inner surfaces have toothed texture. At that, teeth tops face inside prismatic surfaces. Prismatic surfaces ribs are secured on smooth and perforated surfaces, respectively. Cavities, formed by smooth and perforated surfaces, between which complex shaped combined sound-absorbing layer is located, are filled with sound absorbing material from mineral wool on basalt base. Perforated surface inner surface, facing sound-absorbing material, is lined with acoustically transparent material, for example, glass fabric. Cavities of hollow sections formed by prismatic surfaces, are filled with foamed polyethylene or polypropylene.EFFECT: higher efficiency of sound absorption and reliability of design in general.1 cl, 1 dwg
Effective attenuation of leading echo signals in digital audio signal // 2607418
FIELD: radio engineering.SUBSTANCE: invention relates to means of attenuation of leading echo signals in a digital audio signal. Attenuated are leading echo signals in a digital audio signal obtained by encoding by means of conversion. In the decoded signal a position of attack is detected. Determined is a zone of the leading echo signal preceding the position of attack detected in the decoded signal. Attenuation coefficients are calculated for each subunit of the zone of the leading echo signal depending on at least the frame, in which the attack was detected, and on the previous frame. Performed is the leading echo signal attenuation in subunits of the zone of the leading echo signal with the help of appropriate attenuation coefficients. Method of attenuating a leading echo signal additionally includes the step of using adaptive filtration to provide a spectral shape for the zone of the leading echo signal on the current frame prior to the detected position of attack.EFFECT: technical result is the possibility of attenuation of high frequencies and parasitic leading echo signals when decoding without transmitting by the encoder any auxiliary information.13 cl, 12 dwg
Device for providing upmix signal representation based on downmix signal representation, device for providing bitstream representing multichannel audio signal, methods, computer programs and bitstream representing multichannel audio signal using linear combination parameter // 2607267
FIELD: acoustics.SUBSTANCE: invention relates to devices for providing upmix signal representation based on downmix signal representation. Device includes distortion limiter formed to obtain modified imaging matrix using user-defined imaging matrix linear combination and specified imaging matrix depending on linear combination parameter. Device also includes signal processor, generated, to obtain upmix signal representation based on downmix signal representation and associated with parametric information object using modified imaging matrix.EFFECT: technical result consists in provision of high sound quality even in case of audio encoding matrix user selection while maintaining low level of computational efficiency on audio encoder side.21 cl, 19 dwg
Apparatus, method and computer program for providing adjusted parameters for provision of upmix signal representation on basis of a downmix signal representation and parametric side information associated with downmix signal representation, using an average value // 2607266
FIELD: acoustics; data processing.SUBSTANCE: invention relates to mixing. Apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation, on basis of a downmix signal representation and parametric side information associated with downmix signal representation, using an average value of parameters, including a parameter adjuster configured to receive one or more parameters and to provide, on basis thereof, one or more adjusted parameters, wherein the parameter adjuster is configured to provide one or more adjusted parameters depending on an average value of a plurality of parameter values, such that a distortion of upmix signal representation caused by use of non-optimal parameters for provision of upmix signal representation is reduced, at least for one or more parameters deviating from optimum parameters is greater than a predetermined deviation.EFFECT: elimination of audible distortions in signal.22 cl, 10 dwg
Audio signal decoder, audio signal encoder, method of decoding audio signal, method of encoding audio signal and computer program using pitch-dependent adaptation of coding context // 2607264
FIELD: acoustics.SUBSTANCE: invention relates to means of encoding and decoding an audio signal. Audio signal decoder comprises a context-based spectral value decoder configured to decode a codeword, describing one or more spectral values or at least a portion of a number representation of one or more spectral values in dependence on a context state, to obtain decoded spectral values. Audio signal decoder also includes a context state determinator configured to determine a current context state in dependence on one or more previously decoded spectral values. Audio signal decoder also includes a time warping frequency-domain-to-time-domain converter configured to provide a time-warped time-domain representation of a given audio frame on basis of a set of decoded spectral values, associated with given audio frame and provided by context-based spectral value decoder.EFFECT: technical result is improvement of efficiency of encoding in presence of oscillations of fundamental frequency.18 cl, 51 dwg
Device and method for encoding and decoding an encoded audio signal using a temporary noise/overlays generating // 2607263
FIELD: data processing.SUBSTANCE: invention relates to means of encoding and decoding an encoded audio signal. Device for decoding an encoded signal comprises: audio decoder in a spectral region to generate a first decoded representation of a first set of first spectral parts representing residual spectral prognostic values; repeated frequency generating module for generating a restored second spectral part using the first spectral part from the first set of the first spectral parts, restored second spectral part additionally comprises residual spectral prognostic values; and backward predictive filter for inverse frequency prediction using residual spectral values for the first set of the first spectral parts and the restored second spectral part using information of the predictive filter included in an encoded audio signal.EFFECT: technical result is improved encoding/decoding principle, allowing reducing bit rate.20 cl, 41 dwg
Device and method for reproducing an audio signal, device and method for generating encoded audio signal, computer program and encoded audio signal // 2607262
FIELD: acoustics.SUBSTANCE: invention relates to means for generating an audio signal and audio playing. Device comprises a first reproducing means to reproduce the first part of the audio signal based on the first data. Providing means is configured to provide a signal-patch in the second frequency band, wherein the signal-patch is at least partially uncorrelated relative to the first part of the audio signal or is at least partially decorrelated version of the first part of the audio signal, which is shifted to the second frequency band. Second reproducing means is configured to reproduce the second part of the audio signal in the second frequency band based on the second data and signal-patch. Joining means is configured to join the reproduced first part of the audio signal and signal-patch prior to reproducing the second part of the audio signal by the second reproducing means.EFFECT: technical result is generating and reproducing the audio signal with reducing available data transmission speed.15 cl, 13 dwg
Systems and methods for determining set of interpolation coefficients // 2607260
FIELD: information technology.SUBSTANCE: invention relates to systems and methods of determining a set of interpolation coefficients. Method for determining a set of interpolation coefficients by means of electronic device includes determination of a value based on property of current frame and property of previous frame, determination of whether or not value is outside a range, determination of set of interpolation coefficients based on value and prediction mode indicator, if value is outside range.EFFECT: technical result consists in optimisation of throughput, thereby balancing desired average bit rate of recovered voice signal.32 cl, 16 dwg
Adaptation of weighing analysis or synthesis windows for encoding or decoding by conversion // 2607230
FIELD: acoustics; information technology.SUBSTANCE: invention relates to processing an audio signal and/or a video signal in the form of a sequence of samples and is intended for encoding and decoding a digital audio signal. For this purpose encoding or decoding is carried out by converting the digital audio signal using weighing analysis windows (ha) or synthesis windows (hs) used for samples frames, herewith the method includes non-uniform sampling (E10) of the initial window provided for a transformant of preset initial size N in order to use secondary conversion size M, which is different from N. Device includes a sampling module configured able to perform non-uniform sampling of the initial window provided for the transformant of given initial size N in order to use secondary conversion size M, which is different from N.EFFECT: saving memory resources and computational resources when encoding and decoding digital an audio signal by converting using weighing analysis and synthesis windows.15 cl, 7 dwg, 3 tbl
ethod of training and evaluating ringer qualification // 2606864
FIELD: music.SUBSTANCE: invention relates to methods of learning to play musical instruments and is intended for training and evaluating qualification of ringers, playing in musical orchestras, in church and temple bell-towers. It is achieved by the fact that a training place of the ringer, having a given number of strings for controlling tongues, sensors of impact force of tongues with their limit stops and sound generators, included in the software-hardware system, which fixes ringer actions and generates synthesized sounds. At the specified frame randomly or in compliance with layout selected to simulate a bell-tower, brackets are installed, on which tongues are suspended, tongues have preset location, size, weight and swinging-free travel to the limiter, made in the form of a ring or a ring segment the specified size. Tone and timbre of the specified number of generated sounds is selected and is set in the software-hardware system from its library of sounds. And the volume of their sounding is higher, when impact of the tongue with the limit stop, including an impact sensor, is stronger, impact sensor transmits a signal in the software-hardware system for evaluating the impact force and generating a sound signal of corresponding tonality, timbre and volume. Synthesised sound is reproduced and adjusted according to the volume simultaneously from all sound generators or on a case by case basis by preset number of sound generators and/or with filtration of preset sound frequencies through external speakers and/or headphones. Musical compositions of the ringer are recorded and/or reproduced for listening and analysis of fragments or as a whole separately, or with multilayering the sound sample – a training task. Proposed method ensures the creative nature of training, wherein the student is relaxed, he is not shy, is not afraid to make mistakes and he improvises and experiments with pleasure. And it allows to fulfill quickly his potential and to form the required skills, detect of individual "handwriting" and evaluate its learning ability in the selected activity. This method differs from known methods with new properties, it allows to increase efficiency of training and evaluating qualification of ringers by obtaining conditions and data that were not available before.EFFECT: technical result of the proposed method is higher efficiency of training, improving and evaluating skills of the ringer.1 cl
String for musical instruments in the form of cylindrical tension spring // 2606859
FIELD: musical instruments.SUBSTANCE: invention relates to string for musical instruments which is made of steel, besides, it has no core and designed as a spring compressed to disappearance of inner channel.EFFECT: elimination of anti-phase harmonics during vibrations deteriorating quality of produced sound.1 cl
ethod and device for detection of driver in vehicle dangerous condition // 2606656
FIELD: transportation.SUBSTANCE: upon detecting driver hazardous condition in vehicle by means of voice recognition interface (18) first audio signal representing one word is received from the driver, when driver is not in dangerous condition. Based on first audio signal first total time spent on pronouncing one word is determined by interface vehicle device (12). With the help of electronic devices during predetermined period of time driver is suggested to pronounce one word to determine driver state. During predetermined period of time second audio signal from driver representing one word is received. Second total time spent on pronouncing is determined based on second audio signal using vehicle interfacing device (12). Comparing first time with second total time to determine whether driver is in dangerous condition. Invention also discloses devices for detecting driver hazardous condition.EFFECT: determination of driver hazardous condition.20 cl, 11 dwg
Sound insulation system, in particular, for motor vehicle // 2606651
FIELD: transport.SUBSTANCE: invention relates to automotive industry. Motor vehicle sound insulation system comprises a flexible and porous basic buffer layer and an airtight intermediate insulating layer. Basic buffer layer is designed to be placed opposite the surface of the vehicle. Tight intermediate insulating layer is placed onto the basic buffer layer. Tight intermediate layer has the surface density lower than 500 g/m2, in particular, within the range from 50 g/m2 to 400 g/m2. Sound insulation system comprises a rigid porous layer contacting with the tight intermediate layer and having a thickness smaller than the one of the basic buffer layer. Rigid porous layer has a bending rigidity reduced to the unitary width exceeding 0.01 N/m.EFFECT: provided is improved sound insulation and reduced weight of the sound insulation system.14 cl, 7 dwg
ethod of comparison of the first input audio track with the indexed audio track // 2606567
FIELD: information technology.SUBSTANCE: invention describes a method of comparison of the first input audio track with the indexed audio track. Method is carried out on a server. Method involves: selection of indexed audio track as an audio-candidate from a plurality of indexed audio tracks; check of the audio-candidate for a match with the first audio track.EFFECT: elimination of productive capacity costs that occur in the comparison of audio signatures larger parts.23 cl, 8 dwg
ethod and device for classifying noisy voice segments using multispectral analysis // 2606566
FIELD: digital communications; information technology.SUBSTANCE: invention relates to digital communication and voice processing techniques in the conditions of noise masking. Method of classifying noisy voice segments involves multispectral analysis for partial noise suppression by increasing adequacy of the signal Fourier spectrum, which is restored from evaluation of the processed noisy voice signal bispectrum; further, basing on the initial voice signal and standardized Fourier spectrum in each segment identified is presence/absence of classification features of the voice signal and weight coefficients, performed is their correction using the hierarchy procedure and at the final stage a decision is taken upon the issue of associating the segment to typical groups, as per the comparison results formed is a sequence of symbols indicating the typical groups.EFFECT: higher accuracy of classifying noisy voice segments as per typical classification groups.10 cl, 7 dwg
Device for quantization of linear predictive coding coefficients, sound encoding device, device for dequantization of linear predictive coding coefficients, sound decoding device and electronic device to this end // 2606552
FIELD: electronics.SUBSTANCE: invention relates to quantization of linear predictive coding coefficients. Device for quantization of a speech or an audio signal comprises: selection module configured to select basing on a prediction error one of the first sampling unit and the second unit of sampling by open circuit; the first sampling unit is configured to input signal sampling, including, at least, one of the speech signal or the audio signal without an interframe prediction; the second sampling unit is configured to input signal sampling with the interframe prediction.EFFECT: technical result is higher efficiency of quantization of an audio or a voice signal by selecting the optimum quantization module.20 cl, 38 dwg, 9 tbl
Acoustic cellular system with perforated membrane caps // 2606454
FIELD: acoustics.SUBSTANCE: invention relates to acoustics, in particular, to aircraft engines nacelles sound absorbing panels. Acoustic panel comprises cellular panel, having cells, in which membrane caps are arranged. Membrane plastic caps are made from flexible material sheets, which can be perforated before or after, that this material is inserted into cellular panel. Flexible material is flexible enough to, that it could be folded into form of membrane cap. Besides, this flexible material has such width of fixation surface and such material recoverability, which enable to provide friction closure and membrane cap fixation to cellular panel cell, when cap is inserted into cellular panel, in process of acoustic structure making. After caps are inserted into cellular panel cells, to ensure permanent attachment bonding agent is applied onto membrane caps. Caps perforation is performed with laser.EFFECT: technical result is higher strength of structure.12 cl, 9 dwg, 2 tbl
Speech synthesis device // 2606312
FIELD: information technology.SUBSTANCE: invention is aimed at generating a speech signal with given properties. Device for speech synthesis based on text comprises a unit which receives a text line and generates therefrom a sequence of identifiers of audio units, supplied to unit for generating audio signal, and then to a playback unit. Additional control commands are concurrently transmitted to unit for generating audio signal, said commands being generated from sequence of identifiers of audio units generated by unit for generating control commands, depending on language, unit for generating control commands, depending on simulated parameters of a speaker, specifically voice parameters and/or physical and physiological parameters thereof, and unit for generating control parameters of voice colour, tuned to certain psychophysiological state, intended for generating control parameters for correction of intensity of speech signal.EFFECT: technical result consists in improvement of naturalness, intelligibility of speech and emotional colour when generating a speech signal with reduced computational complexity due to improvement of structure elements of speech synthesis system and separation of used databases.1 cl, 1 dwg

Device for prevention of snoring // 2605689
FIELD: medicine.SUBSTANCE: invention relates to medical equipment, namely to devices intended to prevent human snoring taking into account harmful effect of snoring and increased comfort of sleep. Device for prevention of snoring comprises microphone (1), switch (6), first (5) and second (11) conversion units, data storage unit (12), unit of signal recognition (13), sound emitter (10). First signal conversion unit (5) is connected to switch (6), which is connected with its outputs to data storage unit (12) and unit of signal recognition (13). Unit of signal recognition (13) is connected to data storage unit (12), which is connected to second conversion unit (11) connected with sound emitter (10). Control unit (8) is equipped with timer (9), and power supply unit (7) is connected to main units of device. Device is additionally equipped with comparator (3) with controlled level of actuation and relay (4). Microphone (1) is equipped with sound amplifier (2) and is connected via amplifier (2) to comparator (3), made with possibility to supply signal to relay (4). Second output of amplifier (2) is connected via relay (4) to first signal conversion unit (5). Switch (6) is connected to control unit (8) with one of its outputs.EFFECT: higher reliability of device is achieved.1 cl, 1 dwg

Audio encoder, audio decoder, method of encoding audio information, method of decoding audio information and computer program using iterative reduction of size of interval // 2605677
FIELD: data processing.SUBSTANCE: group of inventions relates to audio information encoding/decoding audio techniques. Disclosed is an audio decoder for providing decoded audio information based on encoded audio information. Audio decoder comprises an arithmetic decoder and frequency-domain to time domain converter. Arithmetic decoder is designed to provide a plurality of decoded spectral values based on an arithmetically encoded representation of spectral values. Arithmetic decoder is configured to select a mapping rule describing mapping of a code value onto a symbol code depending on numerical value of current context, which describes current state of context. Arithmetic decoder is also configured to determine numeric value of current context depending on a plurality of previously decoded spectral values.EFFECT: high efficiency of encoding/decoding audio information.15 cl, 48 dwg

Delay-optimised overlap transform, coding/decoding weighting windows // 2604994
FIELD: information technology.SUBSTANCE: invention relates to coding/decoding of a digital signal, consisting of successive blocks of samples. Coding includes application of a weighting window to two blocks of M successive samples. In particular, this weighting window is asymmetric and comprises four distinct portions extending successively over two aforesaid blocks, with a first portion, increasing over a first interval, a second portion, constant at a weighting value over a second interval, a third portion, decreasing over a third interval, and a fourth portion, constant at a weighting value over a fourth interval.EFFECT: technical result is improved quality of encoded sound.17 cl, 10 dwg

Fret of string musical instrument // 2604453
FIELD: music.SUBSTANCE: invention relates to fret for string musical instruments, which is stationary fixed in string musical instrument neck, has seats for each string, wherein material of fret is magnetic alloy, allowing to draw and retain metal strings in seats.EFFECT: technical result consists in long-term preservation of tuning and increasing durability of strings, as well as possibility not to use clamp strings to fret, with straight position of strings from back fret to point of contact with axis of peg.1 cl, 3 dwg

System and method of exciting mixed codebook for speech coding // 2604425
FIELD: information technology.SUBSTANCE: invention relates to means of exciting a mixed codebook for speech coding. Method of encoding an audio/speech signal involves determining a vector of the mixed codebook basing on an incoming audio/speech signal, herewith the mixed codebook vector includes a sum of the first codebook record from the first codebook and the second codebook record from the second codebook. Method additionally includes generating an encoded audio signal basing on the defined vector of the mixed codebook and transfer of a coded excitation index of the defined mixed codebook vector.EFFECT: technical result is increased perceptible quality of the speech signal in comparison with coding systems using only pulse excitation or only noise excitation.26 cl, 17 dwg

Signal processing device, method and program // 2604338
FIELD: communication.SUBSTANCE: invention relates to signal processing device. Envelope information generation module can generate information on envelope that represents enveloping form of high-frequency components of audio signal intended for encoding. Sine-wave information generating module can select sine wave signal from high-frequency components of audio signal and generate information on sine wave, which represents position of appearing sine wave signal. Encoding flow generation module can multiplex information on envelope, information on sine wave, and low-frequency components of audio signal, which were encoded, and outputs encoded stream, obtained in result. As result, high-frequency components included in sine wave signal, can be predicted with higher accuracy from information on envelope and information on sine wave at side of receiving encoded stream.EFFECT: technical result is possibility of obtaining sound of higher quality when decoding audio signal.14 cl, 25 dwg

Decoder and method of multi-instance spatial encoding of audio objects using parametric concept for cases of the multichannel downmixing/upmixing // 2604337
FIELD: acoustics.SUBSTANCE: invention relates to audio systems and is intended for generating output audio signal. Decoder comprises router of input channel to receive three or more channels of down-mixing and to receive auxiliary information, as well as two units of channel processing for generating of two treated channels to obtain output of audio channels. Router of feed channel is made with ability of input of each down-mixing channel in one of two units for processing channel, each of which receives one or more down-mixing channels, at that, each of two units for processing channel takes less than the total number of three or more down-mixing channels. Each unit of processing channel is configured with ability to generate one or more of the two treated channels depending on the auxiliary information and depending of the mentioned one or more down-mixing channels received by said unit of processing channel from a router input channel.EFFECT: technical result - increasing of accuracy of reproducing an audio signal.14 cl, 4 dwg

ultifunctional nut of stringed musical instrument // 2604324
FIELD: musical instruments.SUBSTANCE: invention relates to string musical instruments, for example electric guitar. Nut (12) of stringed musical instrument is fixed in neck (16) of instrument, has seats for each string. In case of nut (12) holes for screws (13) are made, which press rubber buffer (14) to strings (11) and press them against zero fret (15). Zero fret (15) is soldered to case of nut (12), and seats for strings (11) are made in form of slots (17), made on lower side of nut.EFFECT: decreased friction of strings on nut, elimination of plastic deformation of strings and loss of strings from seats, which improves sound of musical instrument and promotes preservation of order.1 cl, 4 dwg

System for damping spectrum of acoustic noise // 2604174
FIELD: acoustics.SUBSTANCE: system for damping spectrum of acoustic noise includes series-arranged on wall of channel acoustic radiator, resonance Helmholtz cell with resonance frequency equal to that of acoustic radiator, and a sensor of acoustic pressure at output of channel connected to acoustic radiator by feedback. Acoustic radiator used is an active mono-frequency piezoelectric radiator with a fixed radiation frequency, and acoustic pressure sensor is designed to control amplitude of radiation of piezoelectric radiator for different noise spectra.EFFECT: disclosed is a system for damping spectrum of acoustic noise.4 cl, 4 dwg

Audio encoder and decoder // 2602988
FIELD: information technology.SUBSTANCE: invention relates to multichannel audio encoding. Method of decoding in multichannel audio signal processing system for reconstruction of M encoded channels, where M>2 comprises following steps: reception of N down-mixing signals with coding shape, comprising spectral coefficients, corresponding to frequencies between first and second crossover frequencies, where 1<N<M; receiving M signals with coding shape, comprising spectral coefficients, corresponding to frequencies of up to first crossover frequency, wherein each of M signals with coding shape corresponds to corresponding one of M encoded channels; down-mixing M signals with coding shape in N down-mixing signals, containing spectral coefficients which correspond to frequencies of up to first crossover frequency; combination of each of N down-mixing signals with coding shape, comprising spectral coefficients, corresponding to frequencies between first and second crossover frequencies with corresponding one of N down-mixing signals, comprising spectral coefficients, corresponding to frequencies of up to first crossover frequency, in N combined down-mixing signals; expansion of each of N combined down-mixing signal into a frequency range above second crossover frequency by means of high frequency reconstruction, as a result of which each expanded down-mixing signal comprises spectral coefficients, corresponding to a range passing below first crossover frequency and higher than second crossover frequency; performing parametric up-mixing of N combined down-mixing signals with extended frequency range in M up-mixing signals, comprising spectral coefficients, corresponding to frequencies higher than first crossover frequency, each of M up-mixing signals corresponds to one of M encoded channels; and combination of M up-mixing signals comprising spectral coefficients, corresponding to frequencies higher than first crossover frequency, with M signals with coded shape, comprising spectral coefficients which correspond to frequencies of up to first crossover frequency.EFFECT: high quality of encoded and decoded audio signal.29 cl, 8 dwg

ethod of producing artificial intermediary language for communication between human and dolphin // 2602976
FIELD: acoustics.SUBSTANCE: invention relates to methods of a bank of acoustic signals and can be used for studying communication between a dolphin and a person. Method of generating a bank of acoustic signals for communication between a dolphin and person in frequency range typical for communication signals of dolphins, comprises generating a bank of reference acoustic signals from separate sounds of an even-tempered sequence of sounds by formatting sounds on same duration and amplitude, recording on a recording medium and measuring their frequency, amplitude and time characteristics. From the recorded sounds, generating reference sounds by changing their duration and/or amplitude and generating therefrom a bank of reference sounds with measurement of characteristics of each reference sound. Generating reference acoustic signals using combinations of obtained reference sounds and measuring frequency, amplitude, time modulations of each generated signal. Each signal is assigned a unique identification code and information content with subsequent comparison of sounds detected by means of acoustic receivers with reference signals of bank.EFFECT: high accuracy of recognition of acoustic signals.1 cl, 1 dwg

Stringed musical instrument capotasto with calibrating fingerholes for strings // 2602959
FIELD: acoustics.SUBSTANCE: invention relates to capotasto for stringed musical instruments. Stringed musical instrument capotasto has a calibrated fingerholes for each string, the strings of a certain diameter are used. Especially this capotasto is suitable for electric guitars having rectilinear arrangement of the strings from the back nut to the point of contact with the axis of splitting. Fingerholes do not allow a string to fall out of the set place of a string in capotasto. In straight position of the strings from the back nut to the point of contact with the axis of splitting, calibrated capotasto does not worsen the sound of a musical instrument. Fingerholes for strings are made by sliding fit.EFFECT: achieved technical result is in improvement of sound of a musical instrument due to long-term preservation of tuning system and increase in durability of the strings and a possibility not to use the strings clamp to capotasto in arrangement of strings from the back nut to the point of contact with the axis of splitting.1 cl, 3 dwg

ethod for parametric reception of waves of different physical nature of sources, processes and phenomena of atmosphere, ocean and earth's crust in marine environment // 2602763
FIELD: measuring equipment.SUBSTANCE: method for parametric reception of waves of different physical nature of atmospheric sources, ocean and earth's crust in marine environment includes spatially separated on controlled waters in tens to hundreds of kilometers of radiating and receiving acoustic transducers formed between working area of nonlinear interaction and parametric conversion acoustic luminal and measured information waves, coupled with converters, respectively, radiating path of formation, amplification and illumination signal radiation environment, as well as receive path gain, spectral analysis of nonlinear transformed luminal signal isolation in spectra of top and (or) of lower sideband, definition and recording information signals, characterised in that working area of nonlinear interaction and parametric conversion luminal and measured information waves formed as a multi-beam space-developed luminal parametric antenna commensurate with extent of controlled waters, which emitting transducer is placed in center of water area and include three omnidirectional unit and placed on an axis above and below axis of underwater sound channel (USC), a receiving transducer is formed similarly to emitting transducer of three identical blocks which have a circular or perimeter on opposite edge of waters and placed relatively PCO analogously emitting blocks, when each receiving unit is formed of three single hydrophones are arranged in a vertical plane along isosceles triangles, and their vertices directed towards emitting transducer, due to this, together with radiating transducers form luminal multipath parametric antenna with a radiating path measuring systems comprise successively connected units: a sound generator stabilised frequency power amplifier, a three-channel unit output matching amplifier with underwater cables continue to emit acoustic transducers and receiving channel measurement system is formed as a multichannel and multifunction that includes a single channel analysis to extract information signals, comprising serially connected blocks: a bandpass amplifier, inverter time scale signals in high frequency region, a narrow-band spectrum analyser and functionally associated recorder (recorder), as well as three channels of measurement functions of correlation between average and extreme hydrophones receiver units, further functions of cross-correlation for measurement of angles arrival of multipath signals “top and bottom” in directions formed vertically luminal parametric antennas for each receiver unit, wherein each of three channels of correlation analysis includes serially connected: bandpass amplifiers, two parallel measuring unit of correlation functions of signals between central and outermost hydrophones receiver units, further blocks measuring cross correlation functions whose outputs are connected to a common recorder unit (burner), and with a calculation unit beam path as luminal parametric antennas, and points of intersection of waters (PC), and single hydrophone each receiver unit via cable channels through switching unit is connected to multi-channel reception path measuring system. Furthermore, nonlinear converted scanning signals from each radiating transducer are received by single receivers of all receiving units, which provide reception of signals in separate pervious arrival times of rays as parametric antennae and separation at angles of arrival of units of correlation and mutually correlation analysis. Furthermore, scanning parametric system is formed as a system of vertical multi-beam parametric antennae and arranged in circle or perimeter of medium through 45 degrees, oriented radially from radiating centre to periphery, which enables to form common spatially developed parametric monitoring system. Furthermore, located in vertical plane receiving units together with radiating units of a multi-beam parametric antenna, wherein vertical distance between transducers receiving units and their hydrophones in vertical plane are set in compliance with correlation properties of transmissive acoustic field. Furthermore, receiving and emitting channels system include radio communication units and matching of radiating and receiving channels of measurement system and its entering via communication channels, preferably satellite, in information-analytical centre multi-link analysis and control system. Besides, the scanning radio-hydroacoustic system for monitoring extended (scaled) across space owing to combining similar subsystems monitoring deployed on other water bodies and are in radio communication channels (preferably space) in a single information-analytical centre, containing information analysis system unit, a radiating and receiving radio units, and two-way link radiating and receiving paths of lighting system and monitoring.EFFECT: technical result is development of large-scale radio-hydroacoustic rear-illuminated tracing monitoring system as a spatially developed multi-beam parametric antenna, comparable with length of controlled medium, which provides far and ultra-long parametric reception in marine environment waves of different physical nature of atmosphere, ocean and earth's crust, generated by natural and artificial sources, phenomena and processes in frequency range covering tens-units of kilohertz, hundreds-tens-units-fraction of hertz, including extremely low frequency, as well as determination of places (distance and depth) of marine sources, quick operation mode adjustment system to changes in environment of propagation of pervious waves, as well as to manifold manifestations of information waves.5 cl, 17 dwg

"multi locking" tuning pin for string musical instrument // 2602371
FIELD: music.SUBSTANCE: invention relates to string musical instrument tuning pin, which has a body, a worm pair for rotation of the rod, on which the string is wound, and a support bushing connected to the pin body with a threaded connection, which the rod lies on under the string tension force, herewith the pin rod in the place of winding the string has arc-like working bearing surfaces for the string arranged along the circumference with angular intervals, and the support bushing has a hole for the rod, where the support bushing hole cross-section is formed by lateral sides of regular parallelepiped and has an additional support bushing located between the tuning pin support bushing and the pin body.EFFECT: technical result is easier tuning of the musical instrument and maintaining the musical instrument tuning scale.1 cl, 5 dwg

etadata conversion // 2602332
FIELD: information technology.SUBSTANCE: invention relates to metadata processing and is intended for metadata conversion with reduced computational complexity. For this purpose, a code converter can convert the inlet bit stream, containing a content inlet frame and associated metadata inlet frame in the outlet bit stream, containing the content outlet frame and associated metadata outlet frame. Code converter comprises a decoder to convert an inlet frame of the content in a set of decoded discrete values of the PCM signal, extraction of metadata from the metadata inlet frame, generation of signature value for the set of decoded discrete values of the PCM and the extracted metadata using cryptographic decoder key, encoder, made to receive the set of discrete values of the PCM and associated metadata, receiving the signature value, checking the received signature value for validity by means of cryptographic coder key, generation of content outlet frame and generation of associated metadata outlet frame of the outlet bit stream.EFFECT: technical result is high accuracy of metadata conversion.25 cl, 13 dwg, 5 tbl

ethod for mobile search of hydrocarbon deposits and bottom objects, detecting signs of occurrence of hazardous phenomena at sea shelf // 2601773
FIELD: geophysics.SUBSTANCE: invention relates to geophysical methods of analysis of marine environment and is intended for mobile searching for oil and gas deposits, bottom objects of various purposes, far anticipatory detecting signs of occurrence of dangerous sea phenomena (destructive earthquakes and tsunami waves) at sea shelf. Summary: method for mobile search of hydrocarbon fields, bottom objects, remote detection of signs of occurrence of dangerous sea effects at sea shelf comprises irradiating controlled marine environment in horizontal plane with low-frequency luminal, and in vertical plane with probing high-frequency acoustic signals and formation in area of their crossing working zone of "triple" nonlinear interaction and parametric conversion of waves of low-frequency and high-frequency pumping medium and measured information waves, radiated by search hydrocarbon deposits, wherein underwater receiving acoustic unit is made from two horizontally spaced apart receivers and is placed in centre of investigated water area, wherein radiating unit employs low-frequency and high-frequency acoustic radiators, wherein radiating unit is placed on mobile carrier, which when searching for sources of information waves is moved along border of investigated water area, using it is formed vertical and horizontal parametric antenna, first of which is located in direction of sea bed and other in direction of receiving unit, wherein waves of probing high-frequency signal, interacting with measured information signals, receiving horizontally spaced apart receivers pervious parametric antennae, amplified in each channel in frequency band parametric conversion, their phase difference signals are measured and their time scale in high-frequency domain, narrow-band spectra thereof, determined in them and parametric components of upper and lower side bands at which, based on parametric and frequency-time conversion of pumping waves, as well as directions of parametric antennae is restored and characteristics of measured information fields corresponding to search criteria of hydrocarbon deposits, for example frequency range, intensity, space-time and spectral structure, as well as determined and fixed direction of their maximum development. Then radiating unit is moved in point where receiving unit is located, then passed specified sources of information signals along this course and length of deposit along it, similarly to displace moving carrier variable tacks repeatedly crosses each course line determined circuit of hydrocarbon deposit area, monitoring and measurement of signs of space-time dynamics of their characteristics, from which identifying measured information waves by their belonging to aqueous geodetic or bottom geophysical. Upon detecting geophysical waves and measuring their spectral characteristics results are compared with generalised reference spectra and identity information waves to specific types of hydrocarbon accumulations, e.g. gas, gas condensate or deposits with inflow of gas, pumping of marine environment in vertical plane of acoustic signals is high-frequency electromagnetic signals, wherein identification and extraction of information waves on background noise of investigated water area is performed taking into account known information on probable characteristics of these fields on basis of information-analytical technologies.EFFECT: technical result is providing mobile search of hydrocarbon deposits on sea shelf with high accuracy of determining area of its occurrence at sea bottom, with high reliability of identifying measured information fields.3 cl, 13 dwg

Radio-hydroacoustic system for mobile search of hydrocarbon deposits and bottom objects, detecting signs of occurrence of hazardous sea phenomena on sea shelf // 2601769
FIELD: hydro acoustics.SUBSTANCE: invention relates to hydroacoustic methods and implementing their systems for searching for hydrocarbon deposits, as well as bottom search objects for various purposes and physical nature, preferably in water areas of sea shelf. Summary: mobile system for searching for hydrocarbon deposits and bottom objects, detecting signs of occurrence of dangerous sea phenomena on sea shelf includes arranged in medium of radiating and receiving acoustic transducers formed between working zone of nonlinear interaction and parametric conversion of measured information waves and medium pumping waves as parametric antenna connected to converters respectively, channel for generating and amplifying low-frequency pervious medium pumping signals, as well as channel for receiving, amplifying, processing, extracting and recording information signals, wherein length of working zone of measuring parametric system corresponds to length of investigated water area, for which radiating and receiving transducers of acoustic signals are spaced at its opposite boundary, wherein radiating transducer is placed on mobile carrier and comprises low-frequency and high-frequency radiators, first of which is made with possibility of horizontal orientation of its beam pattern towards receiving transducer. At that, high-frequency emitter is made with possibility of orientation of its beam pattern on sea bottom, besides, channel for generating and amplifying emitted medium pumping signals is dual-channel containing low-frequency and high-frequency channels, each including series-connected stabilised frequency generator, power amplifier, units for matching amplifier outputs with underwater cables which are connected to corresponding radiating transducers, besides, receiving transducer comprises two horizontally spaced apart receiving unit each of which is connected with the sea surface radio module, which via a radio link is connected to receiving channel system, comprising series-connected with corresponding channel double-channel receiving radio unit of information signals, two-channel broadband amplifier of information signals, unit for measuring phase difference of information signals, time scale of information signals in high-frequency domain, narrow-band spectral analysis unit and functionally connected with recorder spectra extracted information signals. At that, system comprises means of determining position of mobile emitting converters in real time. At that, system includes satellite communication with central station, configured to remote control of its operation in mobile search of hydrocarbons and bottom objects.EFFECT: technical result is provision of efficient mobile searching for hydrocarbon deposits and bottom objects for various purposes and physical nature, long range (advanced) detection of signs of occurrence of dangerous sea effects on extended water areas sea shelf, determination of point objects and boundaries of hydrocarbon deposits on sea bottom with high accuracy, as well as identification of measured information waves generated by artificial and natural sources, as well as hazardous effects of marine environment and Earth's crust in wide frequency range enveloping one kilohertz-hundreds-tens-units-fractions of Herz.1 cl, 13 dwg

Acoustic string instrument // 2601257
FIELD: machine building.SUBSTANCE: invention relates to a sliding saddle system for a chordophone instrument, instrument having a neck, a soundboard and a soundbox, sliding saddle system having at least one combination comprising: I) a bridge plate for connecting to an inner surface of soundboard; II) a saddle for locating on soundboard, saddle comprising an opening for accepting a string and directing it through a slot in soundboard; III) an underblock for retaining string, underblock in slidable engagement with bridge plate; and IV) an adjustable connector for connecting saddle to underblock, such that in use, underblock is slid into position on bridge plate, and connector is tightened, thereby locating saddle on soundboard.EFFECT: technical result consists in reduction of tension on soundboard.20 cl, 8 dwg

ethods and systems for efficient recovery of high frequency audio content // 2601188
FIELD: information technology.SUBSTANCE: invention relates to encoding, decoding and processing an audio signal, in particular, it relates to means of recovering high-frequency content of an audio signal from low-frequency content of same audio signal. Method comprises determining a first banded tonality value for a first frequency subband. First banded tonality value is used for approximating a high frequency component of audio signal based on a low frequency component of audio signal. Determining a set of transform coefficients in a corresponding set of frequency bins based on a block of samples of audio signal. Determining a set of bin tonality values for set of frequency bins using set of transform coefficients, respectively. Forming a first subset of two or more of set of bin tonality values for two or more corresponding adjacent frequency bins of set of frequency bins lying within first frequency subband, thereby yielding first banded tonality value for first frequency subband.EFFECT: technical result is reducing complexity of calculations in audio encoding based on systems with spectral expansion.29 cl, 15 dwg, 2 tbl

Adjustable and folding shoulder rest for violin or alto // 2600712
FIELD: acoustics.SUBSTANCE: invention relates to the shoulder rests for violins and altos. Adjustable folding shoulder rest (10) for violin and altos comprises a base adjacent to the shoulder (20), characterised by presence of the first end (40) and the second end (50). Base includes side adjacent to the shoulder (70) and facing the tool side (60). First folding gripper (80) of fork-shape is located at the first end (40) and is intended for gripping violin or alto, wherein said gripper (80) is designed to be folded from unfolded to folded position. Second folding gripper (90) of fork-shape is located at the second end (50) of the shoulder rest base and is intended for gripping violin or alto, wherein said gripper can be folded from unfolded to folded position. First moving end element (100) to receive the rod with thread serves as a support for the first grip (80). First moving end element (100) is configured to move between extended position and retracted position. First moving end element (100) is equipped with a curved channel, in which the rod turns when the first gripper (80) transmits from unfolded to folded position and back. First moving end element (100) is configured to move in the first groove facing the tool side (60) of the base (20) of the shoulder rest to pull out or to remove the first gripper (80). Second moving end element (110) serves as a support for the second gripper (90). Second moving end element (110) is configured to move between extended position and retracted position. Second moving end element (110) is also equipped with a curved channel, in which the rod (96) turns when the second gripper (90) transmits from unfolded to folded position and back. Second moving end element (110) is configured to move in the second slot on the side facing the tool side (60) of the base (20) of the shoulder rest to pull out or to remove the second gripper (90). Moving end element (100) comprises the first ledge, the shape of which makes it possible to enter in one of the first set of holes located in the first slot. Second moving end element (110) comprises the second ledge, the shape of which makes it possible to enter in one of the second set of holes located in the second slot.EFFECT: ease of adjustment and folding of the shoulder rest is provided.11 cl, 46 dwg

Companding system and method to reduce quantizing noise using improved spectral expansion // 2600527
FIELD: acoustics.SUBSTANCE: invention relates to processing of audio signals. Packing process reduces initial dynamic range of initial audio signal by packaging process, dividing the initial audio signal into a combination of segments using windows of certain shape, calculates gain factor in wide frequency band in the frequency domain using based not on energy average value of discrete values of the frequency domain of the initial audio signal and applies the separate amplification coefficients for amplification of segments with relatively low intensity and attenuation of segments with relatively high intensity.EFFECT: technical result is reduction of quantizing noise.21 cl, 8 dwg

ultistage iir filter and parallel data filtration by such a filter // 2599970
FIELD: information technology.SUBSTANCE: present group of inventions relates to multi-stage filters and may be used for filtering data using such filters. In one embodiment the device contains a buffer memory, at least two cascades of biquadratic filters and a controller connected to the cascades of biquadratic filters and configured to approve a single instruction flow in the first and second cascades of biquadratic filter; the said cascades operate independently and in parallel in response to the instruction flow; the first cascade is connected to the memory and is configured to perform biquadratic filtration of the block of N input discrete values in response to the flow of instructions for generating intermediate values and for approval of intermediate values in the memory, which include a filtrated version of each subset of input discrete values, the next cascade of the filter is connected to the memory and is configured to perform biquadratic filtration of buffered values, extracted from the memory in response to the flow of instructions for generating unit output values, wherein the output values contain an output value corresponding to each of the input discrete values in the block of N input discrete values and buffered values contain some of the intermediate values generated in the first cascade in response to a block of N input discrete values.EFFECT: to enable parallel data processing.36 cl, 11 dwg

Speech decoder, speech encoder, speech decoding method, speech encoding method, speech decoding program and speech encoding program // 2599966
FIELD: information technology.SUBSTANCE: invention relates to speech decoder and encoder speech. Speech decoder includes a multiplexing unit, a unit for decoding the low-frequency band, a block of filter bank for frequency band separation, an encoded sequence, a decoding unit and de-quantiser encoded sequence, a unit for generating high-frequency band, a unit for calculating the time envelope of the low-frequency band, a unit for correction of time bending components of high-frequency band.EFFECT: technical result-reduction of distortion of the reproduced signal.19 cl, 40 dwg

Ultrasound probe with an acoustical lens // 2599404
FIELD: control equipment.SUBSTANCE: invention can be used for ultrasound inspection of materials by means of improved ultrasound probe. This invention consists in the fact that ultrasound probe comprises ultrasound transducer, including emission surface for generating ultrasound waves, and acoustical lens with first part having inner surface facing the emission surface, wherein the inner surface comprises a plurality of protrusions and/or recesses for scattering reflections of ultrasound waves and insulation layer covering at least part of the inner surface.EFFECT: technical result is the possibility to provide ultrasound probe with robust solid body acoustical lens, wherein reflections of ultrasound waves arising from reflecting surface within the acoustical lens are greatly reduced.13 cl, 7 dwg

Selective bass post-filter // 2599338
FIELD: acoustics.SUBSTANCE: invention relates to encoding digital sound, specifically to means of encoding audio signals having components of different nature. Audio encoding method is characterised by a decision whether a device which will decode resultant bit stream must use post-filtering, including attenuation of inter-harmonic noise. Thus, decision on whether to use a post-filter, encoded inn bit stream, is made separately from decision on most suitable encoding mode. Audio decoding method, where a decoding step is followed by a post-filtering step, including inter-harmonic noise attenuation and characterised by presence of step of switching off post-filter in accordance with information on post-filtering, encoded in bit stream signal. Said method is well suited for audio signals of mixed origin due to its ability to deactivate post-filter depending only on information on post-filtering and, therefore, independently of such factors as current encoding mode.EFFECT: technical result is improvement of accuracy of reproducing sound.18 cl, 11 dwg
Film multilayer material with properties of noise killing, containing elementary layer of the polyvinyl(iso)acetal from plasticizer // 2598436
FIELD: machine building.SUBSTANCE: invention is related to a suitable, for example, as an intermediate layer in multilayer safe glass film multilayer material which can be used for producing glass system/film multilayer material/glass for vehicles, aircraft, ships, building glazing, structural elements faces or for producing photovoltaic modules. Versions of film multilayer material are formed with at least three layers A, B and C, containing at least one plasticizer and, at least, one polyvinylacetal, with that, both outer layers (A) and (C) contain at least one identical or different polyvinylacetal, or, at least, one inner layer (B) contains at least one polyvinylacetal, or at least one layer A, B or C contains at least one polyvinyl(iso)acetal.EFFECT: technical result is producing film multilayer material, which has good noise suppression properties, as well as good permeable properties.11 cl, 2 tbl, 7 ex

Device and method for processing audio signal containing transient signal // 2598326
FIELD: acoustics.SUBSTANCE: invention relates to means of processing an audio signal with transition. Audio signal is processed, wherein the first part is removed containing a transient signal, or an audio signal with transition to obtain a resultant processed signal. Second temporary portion is inserted in the processed audio signal, from where the first portion was removed, or where the transient signal in the processed audio signal is located; herewith the second portion contains the transient signal, which has not been processed unlike the initial signal, where the signal processing stage is made with the possibility of extending the audio signal without the transient part, by means of which the first part is extended to the second part, more prolonged in time than the first part, and the module of signal insert has the possibility of copying part of the audio signal containing the transient signal, as well as parts before and after the transient signal so that with summation of the first part and parts being previous and subsequent to the transient signal to have a signal equal by duration to the second part. Insert module is configured to insert a non-modified copy into the processed audio signal or to insert the signal copy containing the transient part, where only the initial part or the end part have been modified.EFFECT: technical result is the improvement of audio signal quality.11 cl, 17 dwg

ethod for assessing variability of a pass phrase (versions) // 2598314
FIELD: information technology.SUBSTANCE: invention relates to speech recognition. Method for assessing variability of a pass phrase comprising obtaining a pass phrase from the user and estimating its variability, characterized by the fact that a pass phrase is obtained from the user in the form of acoustic phrase, acoustic pass phrase is converted in sequence of acoustic criteria, sequence of predefined speech features is calculated by said acoustic phrase and the pass phrase variability is determined by these criteria, then certain pass phrase variability is compared with predefined limit.EFFECT: provision of reliable evaluation of the pass phrases variability.6 cl, 7 dwg

Speech recognition method based on two-level morphophonemic prefix graph // 2597498
FIELD: electronics.SUBSTANCE: invention relates to speech recognition. Speech recognition method comprises steps of: receiving a speech signal, processing speech signal, selecting, in normalised spectrum, pauses, noise and sound signals, identifying and converting speech signal, determining presence/absence therein of acoustic features of speech signal, determining probability of all phoneme conditions, processing recognition hypothesis, comparing parameters of recognition hypothesis, syntactical matching of hypothesis, generating recognition result, converting recognition results of all segments of speech signal, outputting speech signal in form of connected text.EFFECT: technical result is reducing amount of memory elements, needed to store a preset dictionary, and reduced complexity of computer recognition process.1 cl, 5 dwg, 2 tbl

Processing device, processing method, program, computer-readable data record medium and information processing system // 2597487
FIELD: sound.SUBSTANCE: invention relates to processing audio signals. Processing device evaluates noise amplitude spectrum for noise included in an audio signal. Device comprises a module for calculating the amplitude spectrum configured to calculate the amplitude spectrum of the audio signal for each of the frames obtained from separation of the audio signal into time units; and a module for the noise amplitude spectrum evaluation configured to evaluate the noise amplitude spectrum for the noise detected from the frame. Noise amplitude spectrum evaluation module includes the first evaluation module configured to evaluate the noise amplitude spectrum on the basis of a difference between the amplitude spectrum calculated by means of the module for calculating the amplitude spectrum and the frame amplitude spectrum existing before the noise is detected, and the second evaluation module configured to evaluate the noise amplitude spectrum on the basis of attenuation function obtained from the frames noise amplitude spectra existing after the noise is detected.EFFECT: technical result is the reduction of noise amplitude spectrum.11 cl, 2 tbl, 16 dwg

Acoustic structure with wider suppressing range // 2596960
FIELD: sound.SUBSTANCE: frequency band or acoustic range of nacelle or acoustic structure of another type is increased due to acoustic connection of cellular cells to each other to form pairs of acoustic cells, having effective acoustic or resonator length up twice greater than acoustic length of separate cells.EFFECT: formation of pairs of acoustic cells.16 cl, 8 dwg

Audio encoder, audio decoder, method of encoding audio information, method of decoding audio information and computer program using range-dependent arithmetic encoding mapping rule // 2596596
FIELD: acoustics.SUBSTANCE: invention relates to audio encoding. Audio decoder includes an arithmetic decoder to provide a plurality of decoded spectral values based on an arithmetically encoded representation of spectral values; and frequency-domain converter to time domain; arithmetic decoder is configured to select a mapping rule describing mapping of a code value arithmetically encoded display on a symbol code which displays one or more decoded spectral value or at least part of one or more of decoded spectral values, depending on state of context; arithmetic decoder is configured to determine numeric current context value describing state of current context depending on a plurality of previously decoded spectral values, as well as depending on where there is a spectral value to decode-in first preset frequency domain or in second preset frequency domain.EFFECT: technical result consists in improvement of efficiency of encoding at low computational costs.17 cl, 48 dwg
 
2550862.
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