usical instruments and acoustics (G10)

G   Physics(388263)
G10            usical instruments; acoustics(2822)
Decorrelation of signals in audio data processing system // 2614381
FIELD: data processing.SUBSTANCE: invention relates to signal processing. Method of processing audio data includes receiving from a bit stream audio data, corresponding to a row of audio channels, application of decorrelation process to some of audio data, wherein decorrelation process involves using a decorrelation algorithm, active completely on real-valued coefficients.EFFECT: reduced complexity of coding and decoding algorithms owing to decorrelation of only real-valued coefficients.16 cl, 37 dwg

Kochetov wall resonant panel // 2613992
FIELD: machine engineering.SUBSTANCE: wall resonant panel comprises perforated and smooth surfaces, between which there is a sound-absorbing composite layer of complex shape. The latter is an alternation of continuous and hollow sections with a frame made of a rigid sound-absorbing material based on aluminium containing alloys. Hollow sections are formed by prismatic surfaces having in cross-section parallel to the drawing plane, the shape of a parallelogram. Internal parallelogram surfaces have a toothed structure. The teeth tops are directed inward the prismatic surfaces. The edges of the prismatic surfaces are fixed respectively on the perforated and smooth surfaces. The cavities formed by perforated and smooth surfaces between which a sound-absorbing composite layer of complex shape is located, are filled with soft absorbing material of mineral wool on the basis of basalt or basalt wool, or glass wool lined with glass felt. The inner surface of the perforated surface that faces direction of the sound-absorbing material is lined with acoustically transparent material such as fiberglass. The hollow section cavities formed by prismatic surfaces are fiiled with polymer foam and coupled by resonant cavities with openings formed by perforated and smooth surfaces, between which there is a sound-absorbing composite layer of complex shape.EFFECT: improved noise suppression and structure reliability as a whole.1 dwg

ethod and system for helping patient // 2613580
FIELD: medicine.SUBSTANCE: group of inventions relates to medical equipment, namely to means of helping people with memory impairment in social interactions. System is configured to determine whether user identifies person and, if user doesn’t identify person, provision of information identifying that person to user, and contains one or more sensors for measuring physiological characteristics of user, wherein system is configured to determine emotional state of user based on measured physiological characteristics, and identifies whether user identifies person by determining emotional state of user. Method of using system consists in measurement by means of sensors of physiological characteristics of user interacting with person, determining emotional state of user based on measurements of physiological characteristics and determination, whether user identifies person on basis of certain emotional state of user, wherein if user doesn’t identify person, provision of information identifying that person to user. Method includes computer-readable medium. In second version, method involves stages, at which measured physiological characteristics are transmitted to base station, which establishes correspondence of physiological characteristics with level of stress, receiving signal from base station transceiver, which indicates level of stress, it is determined by processor, that user doesn’t identify person on basis of level of stress, person is identified, information on person is provided by means of processor and stored in memory for user so that user identifies person.EFFECT: use of inventions allows to improve possibility of social interaction for people with memory impairment.28 cl, 6 dwg

Duplex cooling system of tape acoustic transducer // 2613512
FIELD: physics.SUBSTANCE: duplex cooling system of the tape acoustic transducer is proposed, which is placed inside the speaker casing. It includes vertically oriented magnets and magnetic cores fixed on them with the slits, in which the frame is located, the height of which exceeds the height of the magnets. Vertical channels, connected with the outside through a labyrinth, are formed between the magnetic cores along the both surfaces of the frame in its central part. A membrane of polyimide film with the electric conductor placed on it in the form of the elongated rectangular spiral, is fixed on the frame . The transducer is fixed with the elongated nuts between the hatches located on the opposite sides of the speaker casing at the distance equal to the height of the frame.EFFECT: improvement of the system.6 dwg

Device for energy impact on anatomical structures // 2613431
FIELD: medicine.SUBSTANCE: invention relates to field of medical equipment, namely to means for energy impact on the zone of ablation of anatomical structures. Device includes container in form of glass filled with contact liquid and closed by means of flexible membrane-applicator, inside which acoustic unit, consisting of coaxially place exoprobe and spherical emitter, is located. Acoustic unit travels by means of manipulator system which contains three links, with the links being placed inside container, being located around acoustic unit at equal angular distance and each connecting acoustic unit with glass bottom by means of hinge.EFFECT: application of the invention makes it possible to increase accuracy of targeting at ablation zone.1 dwg
Piece sound absorber of type kochstar // 2613066
FIELD: machine engineering.SUBSTANCE: piece sound absorber comprises a perforated frame filled with sound-absorbing material, placed in the protective shell. The frame is made of a rigid cylindrical perforated outer shell. The latter is connected to the rigid inner coaxially disposed cylindrical shell through the rigid upper and lower plane bases . Herewith the cavity between the shells is filled with a sound absorbing material such as mineral wool. The sound absorbing material is lined over its entire surface with the acoustically transparent material. A cylindrical hollow rod, made of the sound reflecting material, is mounted on the frame base, inside it, axially to the inner cylindrical shell. The internal rod cavity is filled with the sound absorbing material. The resonance part of the sound absorber is mounted to the rigid perforated cylindrical outer frame shell. The latter is in the form of, at least, two necks of the Helmholtz resonator formed in a cylindrical tube rigidly connected to the external cylindrical shell frame, and mounted perpendicularly to its axis. Herewith the cavities of the tubes are connected with the cavity formed by the rigid inner coaxially disposed cylindrical shell and the rod, and serving as a resonant cavity of the Helmholtz resonator. The cavity volume is calculated for the required frequencies, the noise level at which must be reduced by the resonance part of the sound absorber.EFFECT: increasing the efficiency of sound absorbing.2 cl, 2 dwg
Kochetov's acoustic device // 2613064
FIELD: machine engineering.SUBSTANCE: acoustic device comprises, at least, two sound absorbing sections, each of which comprises walls of the corrugated perforated material, between which the sound absorbing elements are located. The walls of the corrugated material are made with slotted perforation of stainless steel or galvanized sheet. The sound absorbing sections are suspended on the cables on hooks. Each of the sound absorbing elements is made as perforated plates with the layers of the sound reflecting material being placed between them. In the center, the layers of the sound absorbing materials of different densities are located between the layers of the sound reflecting material. Between the latter, the resonant inset with a set of plugs with the resonant holes connected with resonant inserts, is located. The layers of the sound reflecting material are made from a complex profile consisting of the evenly distributed hollow tetrahedrons allowing to reflect acoustic waves incident in all directions, and are installed respectively at the perforated plates. The perforated plate can be made of plastic, such as caproic, or metal mesh with small cells.EFFECT: invention improves the acoustic characteristics in low, mid and high frequencies, at the same time provides dustproof.3 cl, 2 dwg

Sound-absorbing element of kochetov with resonant inserts // 2613061
FIELD: machine engineering.SUBSTANCE: sound-absorbing element comprises a perforated and a smooth surface, between which a layer of the sound-absorbing material of a complex form is located. The latter is an alternation of solid and hollow sections. The hollow sections are formed by the prismatic surfaces having a form of a parallelogram in the section parallel to the drawing plane, the internal surfaces of which have a rack structure. The teeth tops are directed inward the prismatic surfaces, and the edges of the prismatic surfaces are fixed respectively on the perforated and the smooth walls. The cavities of the hollow sections, formed by the prismatic surfaces, are filled with the sound absorber. The resonant plates with the resonant inserts performing functions of the resonator necks "Helmholtz", are located between the smooth surface and the continuous layer sections of the sound-absorbing material of a complex shape and between the perforated surface and the solid sections.EFFECT: noise suppression performance and design reliability, as a whole, are increased.1 dwg

Data encoding method, data decoding method, encoder, decoder and codec // 2613031
FIELD: physics, computer engineering.SUBSTANCE: invention relates to encoding and decoding means. Correspondence of one or more portions of source data with one or more elements within one or more database is set up said one or more elements represent a respective one or more data block, and reference values which connect said one or more portions of input data with said one or more respective element is recorded. Reference values are included in the encoded data together with said one or more databases and/or information identifying said one or more databases. Encoded data including reference values and informaion on area identifiers, and information on one or more database is received. Reference values are decoded from the encoded data. One or more element from said one or more databases is extracted according to said reference values, wherein one or more said elements represents one or more corresponding data block. One or more said data block is formed for collection of corresponding outputting decoded data.EFFECT: invention improves the efficiency of data encoding/decoding.30 cl, 5 tbl, 3 dwg
Polymer sound-absorbing material and method for its manufacturing // 2612674
FIELD: construction.SUBSTANCE: while manufacturing the polymeric absorbing material, a porous sound-absorbing filler material of minimum thickness 3 mm is cut and placed inside the cellular structure layer by means of pressing. Thereafter, a sound-absorbing filler is placed inside said structure at a such height that air cavities of the thickness not less than 2 mm are created on both sides of the sound-absorbing filler. A sound-absorbing filler is arranged by pressing over it the second layer of polymeric material having a density less than 0.3 g/cm3 and the shear strength of not more than 2 MPa, followed by removal of the latter. Thereafter the hydrophobization of the sound-absorbing filler and its gluing to the walls of the cells by impregnating it with a solution based on fluorine or silicone rubber are carried out. Another invention of the group relates to the polymeric sound-absorbing material manufactured by the above method.EFFECT: simplification of manufacturing a sound-absorbing material, reducing its weight and moisture absorption.3 cl, 2 dwg, 1 tbl

ethod of multistructural, multilevel formalizing and structuring information and corresponding device // 2612603
FIELD: information technology.SUBSTANCE: invention relates to a method, a computer-readable storage medium and a data structuring system. Method involves analysis of the initial file for determining initial quantity and value of information, creation by manipulation of the first resultant file from the initial file and the second resultant file from the first resultant file, herewith provided is removal of the processed file element and/or replacement of a combination of multiple elements of the processed file with a representative element and the first indicator, successive use of manipulation processes with respect to the previous resultant file until it provides reducing to the threshold value the quantity of information in the next resultant file as compared to the previous resultant file, herewith the last resultant file has a primary structure with reduced quantity of information relative to the initial quantity of information and a resultant value of information within the limits specified by the selected threshold value of the initial information value.EFFECT: technical result is reduction of the file information quantity while maintaining the value of information within the threshold value.63 cl, 19 dwg

Frequency emphasizing for lpc-based encoding in frequency domain // 2612589
FIELD: information technology.SUBSTANCE: invention relates to encoding and decoding audio signals. Audio encoder comprises a combination of a linear predictive coding filter having multiple linear predictive coding coefficients (LC) and a converter from the time domain into the frequency domain, herewith the said combination is configured with the ability of filtration and conversion of frame (FI) of audio signal (AS) into the frequency domain in order to output spectrum (SP) basing on the said frame (FI) and linear predictive coding coefficients (LC); a low-frequency emphasizing unit configured able to calculate processed spectrum (PS) basing on spectrum (SP), herewith spectral lines (SL) of processed spectrum (PS) representing a lower frequency than reference spectral line (RSL) are emphasized; and a control device made able to control the calculation of processed spectrum (PS) by means of the low-frequency emphasizing unit depending upon linear predictive coding coefficients (LC) of the linear predictive coding filter.EFFECT: technical result is ensuring the minimum of audible artefacts of encoding in the output audio signal at low frequencies by low-frequency emphasizing at the encoder side and deemphasizing at the decoder side.28 cl, 10 dwg

Control over phase coherency for harmonic signals in perceptual audio codecs // 2612584
FIELD: acoustics.SUBSTANCE: invention relates to means for control over phase coherency for harmonic signals in perceptual audio codecs. Decoder comprises a decoding unit and a phase adjustment unit. Decoding unit is adapted for decoding an encoded audio signal to obtain a decoded audio signal. Phase adjustment unit is adapted for adjustment of the decoded audio signal to obtain an adjusted in phase audio signal. Phase adjustment unit is configured able to receive control information depending on the vertical phase coherence of the encoded audio signal. Besides, the phase adjustment unit is adapted for adjustment of the decoded audio signal basing on control information.EFFECT: technical result is improvement the audio signal quality.18 cl, 9 dwg

Audio encoding device, audio encoding method, audio encoding software, audio decoding device, audio decoding method and audio decoding software // 2612581
FIELD: acoustics; information technologies.SUBSTANCE: invention relates to audio encoding and decoding devices. Audio signal transmission device for audio signal encoding includes audio encoding unit, which encodes audio signal, and supplementary information encoding unit, which calculates and encodes supplementary information from predicted signal. Audio signal receiving device for audio code decoding and audio signal output includes audio code buffer, which detects packet loss based on audio packet reception status, audio parameters decoding unit, which decodes audio code, when audio packet is received correctly, supplementary information decoding unit, which decodes supplementary information code, when audio packet is received correctly, supplementary information collecting unit, which collects supplementary information obtained by supplementary information code decoding, missing audio parameters processing unit, which outputs audio parameter, when audio packet loss is detected, and audio synthesis unit, which synthesizes decoded audio from audio parameter.EFFECT: technical result consists in reduction of delay in audio recovery after packet loss when encoding.8 cl, 43 dwg
Shop vacuum cleaner noise suppressor // 2612454
FIELD: machine engineering.SUBSTANCE: suppressor includes a housing, consisting of a cylinder shell, rigidly connected to the end circular plates with inlet and outlet nozzles. The aerodynamic body perpendicular to the direction of flow has at least three reactive chamber formed by circular discs with holes, the holes in the disks alternately offset relative to the housing axis so that the openings do not coincide in the two adjacent disks. In this case three successively connected jet chamber are coupled to the inlet housing and with the chamber and the outlet. In this case the annular chamber is formed by a perforated disc and a circular end plate, which are interconnected by a central sleeve whose inner surface is lined with sound-absorbing material, and a coaxial cylindrical shell. In this case one of the discs facing towards the inlet pipe, is lined with sound-absorbing element round. The ratio of body length L1 to its diameter D is within the optimal values range L1/D=3.5…4.0; and the ratio of housing diameter D to the diameter of outlet nozzle D1 is within the optimal values range D/D1=4.5…5.5; and the ratio of housing diameter D to the diameter of the discs hole d is within the optimal values range D/d=5.0…6.0; and the ratio of housing diameter D to the chamber length LC is within the optimal values range D/LC=2.0…4.5. The housing is made of structural materials, coated on its surface on one or both sides with a soft vibration damping material, wherein the ratio between the thickness of the lining and vibration damping coating lies in the optimal range of values of 1: (2.5…3.5).EFFECT: improved efficiency of noise suppression.2 cl, 3 dwg

Signal processor, window provider, coded media signal, signal processing method and method of forming windows // 2611986
FIELD: information technology.SUBSTANCE: invention relates to signal encoding and is intended for processing a signal with window weight coefficients. Signal processor for providing a processed version of an input signal depending on input signal comprises a windower, configured to window a portion of input signal, or of a pre-processed version thereof, in dependence on a signal processing window, described by signal processing window values for a plurality of window value index values, in order to obtain processed version of input signal. Signal processor also comprises a window provider for providing signal processing window values for a plurality of window value index values in dependence on one or more window shape parameters.EFFECT: technical result is high efficiency of encoding by adaptation of window characteristics to characteristics of input spectrum.6 cl, 16 dwg

Device and method for wide bandwidth signal generating from audio signal with limited band pass // 2611974
FIELD: acoustics.SUBSTANCE: invention relates to audio signal processing. Device for wide bandwidth signal generation from audio signal with limited band pass comprises patches generation module, signals processing module and combining module. Patches generation module is made with possibility of harmonic patching algorithm execution for, to obtain signal after patching. Patches generation module is made with possibility to execute harmonic patching algorithm for current time unit with wide bandwidth from plurality of successive time units with wide bandwidth using time unit preceding in time with limited band pass from plurality of successive time units with limited audio signal band pass with limited band pass.EFFECT: technical result is improved wide bandwidth signal generation with exclusion of additional delay.16 cl, 17 dwg

Attenuation of noise in signal // 2611973
FIELD: physics.SUBSTANCE: invention relates to noise attenuation in signal. Noise attenuation device comprises receiver for receiving first signal of environment, which contains component of required signal corresponding to signal of required source of environment, and component of noise signal corresponding to noise in environment, two code books, input for receiving sensor signal, which is measurement of environment, segmentator for segmentation of first signal into time segments, noise attenuator, configured to perform for each time segment stages of forming of plurality of estimated versions of signal and noise attenuation of first signal in given time segment in response to version of signal.EFFECT: improved more accurate noise attenuation and simplification of noise attenuation.14 cl, 4 dwg
Combined receiver for registration of respiratory sounds on the chest surface // 2611735
FIELD: radio engineering, communication.SUBSTANCE: combined receiver for recording respiratory sounds on the surface of the chest is a housing (10) with the inner solid plate (9), a stethoscopic attachment (11) having a flat outer bottom surface and two sensors. The first sensor is designed as a microphone (1), mounted on the solid plate (9) above the mouth of the stethoscopic attachment (11) and rigidly connected with the solid plate (9) via the flexible gasket (12). The second sensor is configured as an annular bending bimorph piezoelectric transducer (2-4) with a central hole. The inner edge of the second sensor is fastened all-round with the upper part of the stethoscopic attachment (11) providing communication of the internal cavity of the stethoscopic attachment (11) with the microphone (1). The outer edge of the second sensor is attached to the perimeter of the solid plate (9).EFFECT: increase of signal-to-noise ratio at the receiver output that provides increased receiver interference immunity and increased reliability of diagnostic information.1 dwg
Kochetov's acoustic panel // 2611652
FIELD: machine engineering.SUBSTANCE: panel contains the housing and the noise absorbing insert, located in its internal hollow. The housing is made in the form of a rectangular parallelepiped, formed by the perforated front and solid rear walls of the panel. Each panel is U-shaped with side edges, wherein there is the slot perforation on the front wall. The latter is formed in the shape of rectangles and positioned in rows with the width b1 and b2 and the distance between them is h1 and h2. The adjacent rows are offset positioned. The number of slots in one row is even, and in the other - is odd. The perforation coefficient is assumed equal to 0.25 or more. The walls of the panels are fixed to each other by vibration damping covers. The covers are U-shaped with cells, filled with vibration-damping resin for panels connection. The noise absorbing insert is made in the form of the solid rigid wall from the rigid vibration damping material and the perforated wall from mesh polymeric material. The double layer composite acoustic absorbing element is located between them. The layer adjacent to the rigid wall is made as acoustic absorbent. The layer, adjacent to the perforated wall is made from acoustic-absorbing material of the complex profile, consisting of uniformly distributed hollow tetrahedrons, allowing to reflect the acoustical surges incident in all directions. Thus the acoustic-absorbing layer is placed in an acoustically transparent material, such as a glass cloth or nonwoven fabric, such as "frost cloth".EFFECT: invention increases the noise absorption efficiency by expanding the frequency range and simplifies installation, improves the performance properties.2 cl, 2 dwg
Sound-absorbing element // 2611649
FIELD: construction.SUBSTANCE: sound-absorbing element comprises the smooth and the perforated surfaces, between which the multilayer composite structure is arranged. The latter is made of complex shape and represents an alternation of sound-absorbing solid sections and hollow sections filled with sound-absorbing material. The solid portions are formed by smooth prismatic surfaces arranged perpendicular to the smooth and the perforated surfaces and fixed to the smooth surface, as well as by two surfaces of a complex shape, connected therewith and inclined with respect to the smooth prismatic surfaces. The latter have the smooth surface on one side and geared on the other side. The tops of the teeth face inside said surfaces, and the surfaces themselves are fixed on the perforated surface. Wherein sound-absorbing resonance relief elements are fixed to the smooth surface. The sound-absorbing elements are made in the form of tetrahedrons, which alternate with the resonance elements made in the form of cones with resonance bushings, and the outer surfaces of which are covered with sound-absorbing conical shells.EFFECT: increased noise reduction efficiency and design reliability as a whole.1 dwg

Percussion musical instrument // 2611485
FIELD: musical instruments.SUBSTANCE: invention relates to percussion musical instruments and can be used in production of musical instruments for different music genres and styles. Percussion musical instrument contains snare head with strings, pad, silencer, silencer position control mechanism relative to front deck, control mechanism is equipped with Ericsson nut, grub screw, screw holder and set-in nut, wherein screw is rigidly connected with Ericsson nut, which are installed on rear face with possibility of rotation. Set-in nut is rigidly installed on pad and kinematically connected with grub screw with possibility of pad with silencer plane-parallel movement relative to front deck surface, and snare head strings are rigidly fixed on guides and pressed to front deck on instrument inner side, which enables to adjust snare head strings free motion suppression degree. Front deck has rigid tight coating on inner side, which enables to prevent snare head strings oscillations suppressing by improving their rebound from resilient solid surface.EFFECT: separator is made in form of rectangular panel with seal, moved by means of screw mechanism, at separator pressing to front deck on inner side front deck is divided into two independent areas for playing, upper area is emitting only high-frequency sounds at impact, lower one emits only low-frequency sounds.4 cl, 11 dwg

Transform encoding/decoding of harmonic audio signals // 2611017
FIELD: information technology.SUBSTANCE: invention relates to means of encoding and decoding of harmonic audio signals. Encoder for encoding frequency transform coefficients of a harmonic audio signal includes following elements: a peak locator, configured to locate spectral peaks having magnitudes exceeding a predetermined frequency dependent threshold. Peak region encoder configured to encode peak regions including and surrounding located peaks. Low-frequency set encoder configured to encode at least one low-frequency set of coefficients outside the peak regions and below a crossover frequency that depends on ] number of bits used to encode peak regions. Noise-floor gain encoder, configured to encode a noise-floor gain of at least one high-frequency set of not yet encoded coefficients outside peak regions.EFFECT: technical result consists in improvement of quality of encoded harmonic audio signal.20 cl, 23 dwg, 1 tbl

Calculation of converter signal-noise ratio with reduced complexity // 2610588
FIELD: sound.SUBSTANCE: present invention relates to sound encoding and decoding facilities. Audio encoder includes conversion module, configured to determine set of spectral ratios based on said audio signal frame. Besides, encoder comprises encoding module with floating point, made with possibility to determine set of scaling factors and set of scaled values based on said set of spectral ratios; and encoding said set of scaling factors to obtain encoded set scaling factors. In addition, encoder comprises bits distribution and quantization module, configured to determine total number of available bits for set of scaled values quantization based on data transfer first target rate and based on number of bits used for set of coded scaling factors; determination of first control parameter, which serves as sign of total number of available bits distribution for quantization of scaled values from set of scaled values; and for set of scaled values quantization.EFFECT: technical result consists in reduction of computational complexity of bits distribution process used in audio encoding/decoding.32 cl, 12 dwg

ultichannel audio playback // 2610416
FIELD: acoustics.SUBSTANCE: invention relates to playback of multichannel audio and is used, in particular, in a home theater/surround sound playback system using wireless speakers units. Multichannel audio playback system comprises an audio playback module, which generates audio signals for multiple audio channels. Multiple interchangeable speakers units comprises a storage battery and an audio converter to playback an audio signal. Charging unit is connected to a specific audio channel and has a charging source, which can charge a storage battery connected to a speaker unit. Binding circuit can bind the speaker unit when it is connected to the charging unit with the first audio channel. System can continuously associate specific channels with charging units (or passive bases of speakers, which can not perform charging), and the interchangeable speaker units can be adapted depending on their connection. This approach may enable to perform charging a speaker unit (possibly, a wireless one) just by replacing this speaker unit with one of those connected to the charging unit.EFFECT: technical result is increased flexibility and easier operation by reducing the need for wire connections.15 cl, 16 dwg

Harmonic audio frequency band expansion // 2610293
FIELD: physics.SUBSTANCE: plurality of the gain values associated with the frequency band b and the plurality of the adjacent frequency bands for band b are received. It is determined whether the reconstructed corresponding frequency band b' contains a spectral peak. When band b' contains a spectral peak, the gain value associated with band b' is set as the first value based on the received plurality of the gain values; and otherwise, the gain value is set as the second value based on the received plurality of the gain values.EFFECT: improving quality of the harmonic audio frequency band expansion.12 cl, 10 dwg

ethod of detecting low-rate encoding protocols // 2610285
FIELD: physics, acoustics.SUBSTANCE: invention is intended for detecting low-rate speech encoding (LRSE) protocols . The technical result is achieved by increasing the number of dimensions of a measured vector of redundancy factors Z to L, L=Z+2 and accounting for the shifting effect of vector elements L by forming a quadratic reference matrix Lj et for all J known LRSE protocols, j=1, 2 , J. To this end, a digital stream Y is received during a given time interval T. A rectangular information matrix YKL is formed, rows of which are information units arranged in series one below the other. The vector of redundancy factors L is calculated, followed by element by element comparison of the measured vector L with rows Lj et(l) of all J quadratic reference matrices Lj et, determining deviation Pj(l) between the measured vector L and rows of all J reference matrices Lj et, making a decision in favour of the j-th LRSE protocol, for which is ensured minimum deviation Pj(l)min of the measured vector L from the l-th row of the j-th quadratic reference matrix Lj et.EFFECT: method of improving accuracy of detecting LRSE protocols.3 cl, 9 dwg
Kochetov screw-type sound-absorbing structure // 2610039
FIELD: machine building.SUBSTANCE: sound absorbing structure is made in the form of two perforated walls, between which the multi-layered sound absorbing element. The multilayer sound absorbing element is double-layered. The layer adjacent to one of the walls is sound-absorbing, and the layer adjacent to the other perforated wall is made of a sound reflecting material consisting of complex profile composed of evenly distributed hollow tetrahedrons, allowing to reflect acoustical surges incident in all directions. Each of the perforated wall has following perforation parameters: hole diameter - 37÷ mm, the percentage of perforations÷ 10%15%. As per shape the holes can be made as holes having round, triangular, square, rectangular or diamond profile. In case of unround holes the nominal diameter shall be maximum diameter of circle inscribed in the polygon. Asa sound-proof material the plates from basalt-based mineral wool like "Rockwool", or "URSA" mineral wool, or basalt cotton wool P-75, or glass-wool with a woven glass liner are used. The sound absorbing element over the full surface is lined with the acoustic transparent material, for example, glass fabric EZ-100 or polymer "poviden".EFFECT: invention improves the efficiency of noise suppression and reliability of the design as a whole.4 cl, 1 dwg

Kochetov single-piece sound absorber // 2610028
FIELD: physics, acoustics.SUBSTANCE: invention relates to industrial acoustics, particularly to single-piece sound absorbers. Said sound absorber includes a frame filled with sound-absorbing material, placed in a protective shell. The frame is made from a rigid perforated external cylindrical shell which, through rigid upper and lower flat bases, is connected to an inner coaxially arranged cylindrical shell made of sound-reflecting material. The shells of the frame form an inner cylindrical central cavity which is axially symmetrical to the frame. The upper and lower flat bases of the frame, arranged opposite each other, are made of perforated areas, arranged in peripheral parts thereof, in contact with the cavity between the shells, filled with sound-absorbing material. The central parts of the flat bases of the frame are sound-insulating and are respectively arranged in the upper and lower parts of the central cavity and are double-layered. One of the layers is made of sound-reflecting material and the other is made of sound-absorbing material, arranged between the sound-reflecting material and the external surface of the bases. The resonance part of the sound-absorber is attached to the rigid perforated outer cylindrical shell. The former is made in the form of at least two necks of a Helmholtz resonator, made in form of cylindrical tubes, rigidly connected to the outer cylindrical shell of the frame and installed perpendicular to its axis. The cavities of the tubes are connected to the inner, axially symmetrical to the frame, cylindrical cavity, serving as the resonance cavity of the Helmholtz resonator, the volume of which is calculated for the required frequency.EFFECT: invention provides high efficiency of soundproofing.4 cl, 2 dwg
Ring type kochetov sound-absorbing structure // 2610024
FIELD: machine building.SUBSTANCE: ring-type sound absorbing structure is made in the form of two perforated walls, between which the multi-layered sound absorbing element. The construction in the axial section is designed in the form of a ring, the walls of which are two-layer. The layer adjacent to one of the walls is sound-absorbing, and the layer adjacent to the other perforated wall is made of a sound reflecting material consisting of complex profile composed of evenly distributed hollow tetrahedrons, allowing to reflect acoustical surges incident in all directions. Each of the perforated wall has following perforation parameters: hole diameter - 3÷7 mm, the percentage of perforations 10%÷15%. As per shape the holes can be made as holes having round, triangular, square, rectangular or diamond profile. In case of unround holes the nominal diameter shall be maximum diameter of circle inscribed in the polygon. Asa sound-proof material the plates from basalt-based mineral wool like "Rockwool", or "URSA" mineral wool, or basalt cotton wool P-75, or glass-wool with a woven glass liner are used. The sound absorbing element over the full surface is lined with the acoustic transparent material, for example, glass fabric EZ-100 or polymer "poviden".EFFECT: invention improves the efficiency of noise suppression and reliability of the design as a whole.4 cl, 1 dwg
Kochetov multilayer combined structure // 2609482
FIELD: physics, acoustics.SUBSTANCE: invention relates to industrial acoustics, particularly to multilayer combined acoustic structures. The structure comprises a smooth and a perforated surface, between which there is a combined structure with an irregular shape. The latter is an alternation of sound-absorbing solid areas and hollow areas filled with sound-absorbing material. The solid areas are formed by smooth prismatic surfaces, arranged perpendicular to the smooth and perforated surfaces and are attached to the smooth surface, as well as two irregularly shaped surfaces coupled therewith and inclined relative to the smooth prismatic surfaces. The irregularly shaped surfaces have on one side a smooth surface and on a toothed surface on the other. The vertices of the teeth or protrusions face inside said surfaces and the surfaces themselves are attached on the perforated surface. Noise-absorbing relief elements are attached to the smooth surface. Said noise-absorbing relief elements are sound-absorbing elements in the form of tetrahedrons, which alternate with resonance elements, made in the form of cones with resonant bushings. The outer surfaces of the resonance elements are coated with sound-absorbing conical shells. The material of the resonance elements, made in the form of cones, is a hard sound-reflecting material based on aluminium-containing alloys.EFFECT: high efficiency of soundproofing and reliability of the structure as a whole.1 dwg

ethod and device to detect voice activity // 2609133
FIELD: information technology.SUBSTANCE: invention relates to voice activity detection (VAD). Method includes creation of a signal indicating the primary VAD solution and determining the need to add wave tails, determining the need to add the wave tails is performed depending on the measure of short-term activity and the measure of long-term activity. Then a signal is generated indicating the final VAD solution.EFFECT: technical result is reducing the possibility of voice cutout in voice packets due to more specific adding of wave tails.27 cl, 9 dwg

Device and method of spatial audio encoding streams combining based on geometry // 2609102
FIELD: acoustics.SUBSTANCE: invention relates to audio data composite stream generating means. Device contains demultiplexer to produce plurality of audio data single-level streams, where demultiplexer is adapted to receive one or more audio data input streams, where each audio data input stream contains one or more levels, where demultiplexer is adapted for demultiplexing of each of audio data input streams, having one or more levels, on two or more demultiplexed audio data streams, having exactly one level, so, that said two or more demultiplexed audio streams together contain said one or more levels of audio data input stream. Besides, device also contains matching module for generating of audio data composite stream, having one or more levels, based on said plurality of single-level audio streams.EFFECT: technical result consists in providing possibility of audio data composite stream generating.18 cl, 44 dwg

Device and methods for adaptation of audio information at spatial encoding of audio objects // 2609097
FIELD: acoustics.SUBSTANCE: invention relates to means for adaptation of input audio information encoding one or more audio objects. Input audio information includes two or more input downmix audio channels and additionally contains input parametric supplementary information. Adapted audio information includes one or more adapted downmix audio channels and additionally contains adapted parametric supplementary information. Device contains a downmix signal modifier for adaptation, depending on the adaptation information, of two or more input downmix audio channels to obtain one or more adapted downmix audio channels. Besides, the device comprises a means to adapt parametric supplementary information for adaptation, depending on the adaptation information, of the input parametric supplementary information to obtain the adapted parametric supplementary information.EFFECT: technical result is improvement of efficiency of adaptation of audio information to a specific target application scenario.13 cl, 9 dwg

Comfortable noise generation // 2609080
FIELD: acoustics.SUBSTANCE: invention relates to comfortable noise generating devices. Predetermined size buffer is configured, to store CN-parameters for SID (Silence Insertion Descriptor) frames and tightening active frames. Subset selecting device is configured to determine CN-parameters subset relevant for SID-frames, based on stored CN-parameters age and based on residual energies. Comfortable noise control parameters extraction device is configured, in order to use certain subset of CN-parameters for determining of CN control parameters for first SID-frame, following active signal frame.EFFECT: technical result consists in increase in perceptible sound quality.18 cl, 12 dwg

Level adjustment in time domain for decoding or encoding audio signals // 2608878
FIELD: acoustics.SUBSTANCE: invention relates to encoding, decoding and processing audio signals. Audio signal decoder for providing a decoded audio signal presentation based on an encoded audio signal presentation includes a cascade of preliminary processing of the decoder to obtain a plurality of frequency band signals from the encoded audio signal presentation, a clipping estimation module, a level shift module, a converter of the frequency domain into the time one and a level shift compensator. Clipping estimation module analyses the encoded audio signal representation and/or an additional information regarding amplification of frequency band signals to determine the current level shift coefficient. Level shift module shifts the frequency band signals levels in accordance with the level shift coefficient. Converter of the frequency domain into the time one converts the frequency band signals with shifted levels into the time domain presentation. Level shift compensator affects the time domain presentation for partial compensation of the corresponding level shift and for producing a significantly compensated presentation of the time domain.EFFECT: technical result is the possibility of the signal level adjustment within the dynamic range without loss of the data accuracy.16 cl, 17 dwg

Audio scenes encoding // 2608847
FIELD: acoustics.SUBSTANCE: invention relates to sound encoding and decoding. Exemplary embodiments offer encoding and decoding methods and corresponding coders and decoders for audio scene encoding and decoding, which contains at least one or more audio objects. Encoder generates bit stream, which contains step-down mixing signals and additional information, which comprises separate matrix elements for recovery matrix, which enables possibility for recovery of one or more audio objects in decoder.EFFECT: technical result is provision of less complex and more flexible recovery of audio objects.33 cl, 9 dwg

Device and method for generating extended by frequency signal using subranges time smoothing // 2608447
FIELD: sound.SUBSTANCE: invention relates to audio coding and is based, in particular, to frequency spectrum improvement procedures, such as frequency band expansion, spectral range replication or smart intervals filling. Improved spectrum signal generating device comprises: signal generator for expansion signal generating from main signal, wherein expansion signal has expansion frequency range, not included into main signal, in which expansion signal or main signal current time part contains subband signals for plurality of sub-bands; controller, to calculate same smoothing information for plurality of subband signals of frequency range expansion or main signal, and in which signal generator is configured for smoothing plurality of subband signals of frequency range expansion or main signal using same smoothing information.EFFECT: technical result is expansion of frequency band and increasing quality of encoded low-frequency signal.14 cl, 18 dwg
Sound absorbing wall covering // 2608408
FIELD: construction; acoustics.SUBSTANCE: invention relates to multilayer finishing sound absorbing materials and refers sound absorbing wall covering. Includes: (a) support layer made of organic polymer foam material, which open porosity makes 0.50–0.995, (b) surface layer made of glass-fabric material, which static resistance to air flow, measured according to ISO 9053 standard, ranges from 105 H•c•m-4 up to 106 H•c•m-4 and (c) intermittent adhesive layer, which surface density makes from 17 to 60 g/m2, at boundary between support layer (a) and surface layer (b). Invention also relates to said coating making method and to use of such coating for improvement of room or building acoustic comfort.EFFECT: invention provides creating wall coating, which provides acoustic comfort, id est reduction and optimization of reflected sound component.13 cl, 1 tbl, 8 ex
Sound absorbing wall coating // 2608407
FIELD: acoustics.SUBSTANCE: invention relates to multilayer sound absorbing finishing materials and to a sound absorbing wall coating. Includes: (a) a support layer, made of non-woven material based on organic fibres, having a multi-lobe cross-section, (b) surface layer, made of glass-textile material, for which static air flow resistance, measured according to ISO 9053, ranges from 105 N⋅s⋅m-4 to 106 N⋅s⋅m-4, (c) a discontinuous adhesive layer, whose surface density is equal to 17–60 g/m2, at boundary between support layer (a) and surface layer (b). Invention also relates to a method of making said coating and to use of such coating for improvement of acoustic comfort of a room or structure.EFFECT: invention enables to create a wall coating, which provides acoustic comfort, that is, reducing and optimising reflected sound component.16 cl, 1 ex
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
 
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