Portable electro-acoustic screening device telephone sets

 

(57) Abstract:

Portable electro-acoustic device relates to the field of communication technology, to electro-acoustic devices, systems, operational control of the state telephone devices during their operation. The device includes a block generator test signal, the block offset of the test signal, the power amplifier module, block phone booth, including artificial mouth, ear and artificial elements installation of the microphone of a telephone, a block detector, measuring device, a switching unit. Extending the functionality of the device while improving reliability and accuracy of inspections achieved by introducing between the artificial mouth and the ear of the artificial bell section, made in the form of an extended solid-walled tube extended from both sides of the cross section that is installed with the possibility of combining one side, the inner surface of which is covered with sound-absorbing layer through the first elastic strip to the segment of the frame of the artificial mouth and the other side through the second elastic gasket with artificial ear using attached to the bell section hinged crowns Ana in this position. 1 Il.

The invention relates to communication technology, namely the technique of testing, and more particularly to electro-acoustic devices, means operative control telephones during their operation in situ.

Known electro-acoustic system control parameters phone type devices 3356 company "BRUEL and CHER" (Catalogue of the firm 1993), performed in instrument racks and includes a set of independent standard devices: signal generator 1023, band-pass filter 1618, two 2610 measuring amplifier, preamplifier 2619, measuring microphones 1/2-inch and 1 inch, artificial voice 4219 with microphone 4036, acoustic calibrator 4230 (with adapter 0310), measuring frequency characteristics 4712, the meter equivalent attenuation 4904, telephone test bench 4905 telephone unit 4906, rack with accessories COP 3356, 3357 COP (cables, adapters, boxes, panels, etc), and in working condition when combining devices into the system using the external, in relation to devices, connecting cords to the output of the signal generator is connected to the input of the meter equivalent attenuation, the output of which, in turn, depending on the type of the checked parameter telecommuting their chains and acceptance transmission through the telephone unit, despite the fact that the microphone of the telephone set in a telephone test bench facing the cushions of the microphone to the sound-emitting surface of the artificial voices, and the cushions of the phone to the measuring microphone with camera connection, and the output of the transmission path of the telephone apparatus is connected to the input of bandpass filter, the output of which is connected to the input of the measuring amplifier or the input of the measuring frequency characteristics, and the output of the measuring microphone is connected to the input of the measuring amplifier or meter frequency characteristics.

Before checking telephones readiness, the suitability of the system for measurement is established by calibration of the measuring paths by using an external calibrator from the system.

During verification, telephone sets electrical signal generated by the generator is converted into acoustic artificial voice and acts on the microphone handset of a telephone set in a telephone test stand while providing a defined position relative to the artificial voices, this removes signally measuring frequency characteristics); or electrical signal generated by the generator is fed to the input of the reception path of the phone and the converted phone in its structure in the acoustic signal is picked up by the microphone on the camera connection which loaded phone when you install it in the phone test bench, and amplified by the preamplifier analyzed the corresponding meter.

When the software checks telephones on a wide set of parameters of the system including the above-mentioned set of devices powered by AC 127/220 V, structurally integrated as standard for the firm racks of considerable size, are not suitable for operational control of the state of the telephone apparatus in operating conditions on the objects of their placement, including mobile.

Specified restrictions on the use of deprived known device SA-15 RH.762.012, representing the portable electro-acoustic device control parameters telephones, made in a single compact, with dimensions of 550 x 400 x 300 mm, suitable for moving a person and installed on site, the operation check of the telephone apparatus in situ.

The device includes a block generator test is OK corrector envelope of the test signal in the form RC-chain the power amplifier module built on traditional for this kind of devices the diagram, block phone stand (block installation of microphone telephone), including the voice of the artificial (artificial mouth), representing the sounder, ensuring faithful reproduction of the audio signal is set by the ratio of the frequency levels of its components in the specified frequency range, the artificial ear (microphone measurement, providing undistorted reception of a sound signal with a defined relationship between the levels of its components within the defined frequency range, with camera connection representing sized amount of acoustic load as set out in the regulatory documents of the ICC TT), and provided with elements for installation when checking phone his microphone into position microphone cushions in front of your mouth artificial, and telephone cushions opposite the artificial ear, the detection unit, built on traditional for this kind of devices the diagram, the arrow indicator in the form of a measuring head for the set as a controlled signal, the switching unit, built on traditional for otkluchenie), when this electrical connections inside the generator output connected to the input of the offset, the output of which, in turn, is connected to the input of the amplifier, whose output is connected to the input of the artificial mouth; telephone their chains of transmission and reception of serial scan (path transmission and reception) is enabled by the switching unit, respectively, at the output of the amplifier and to the input of the detector, whose output is connected to the input of the indicator.

During inspections output (electric) - level transmission path generated by the noise generator electrical signal of "white" spectrum comes to RC-corrector, is transformed by the envelope of the speech spectrum signal, is amplified by the power amplifier and when asked the level of effect on the artificial mouth that converts an electrical signal into an acoustic, which affects the microphone of the microphone of the phone, located before the artificial mouth in block a phone booth in a specified position at a certain distance and at an angle to the axis of the artificial mouth); the electrical signal at the output of the transmission path when the excitation ICRI is onea arrow. When the level of the output signal within the defined limits of the arrow indicator will be marked "TRANSFER" sector of the scale indicator ("TA - SUITABLE FOR the TRANSMISSION PATH"); when the arrows outside the marked sector "THAT IS NOT GOOD."

During inspections output (speaker) level on the reception path generated by the noise generator electrical signal of "white" spectrum comes to RC-corrector, is transformed by the envelope of the speech spectrum signal, is amplified by the power amplifier and when asked the level affects the input of the reception path (the amplifier input of the reception path) and then on the phone microphone phone located in block a phone booth in a certain position: telephone cushions on the artificial ear converts your phone into an acoustic signal is perceived and converted by a microphone artificial ear into an electrical signal input to the detector, which after rectification arrives on the dial gauge, deflecting the arrow. When the level of the output signal within the defined limits of the arrow will be marked "RECEPTION" sector of the scale indicator ("TA - SUITABLE FOR RECEPTION PATH"); when the arrow out atmarketing schema (specified electrical signal generator test signal.

A drawback of the device is the lack of calibration and validation without the involvement of external devices and equipment, the entire measuring path directly before checking the settings of the phone, including those within the device necessary electrical elements: mouth artificial, artificial ear, when possible care of their parameters during operating time can lead to a false assessment of the state of the telephone apparatus according to the criterion of PASS - fail limits, i.e., the lack of evaluation of the current state of the system, its functionality.

The proposed solution is aimed at expanding the functionality of the device while improving reliability and accuracy of inspections.

The specified purpose of the proposed technical solution is achieved due to the fact that the known portable electro-acoustic device checks the phone that contains the block generator test signal, the block offset of the test signal, the power amplifier module, block phone booth, including artificial mouth and the ear of the artificial elements of the installation of the microphone of a telephone, a block detector, measuring , connected to the input of the power amplifier module, whose output is connected to the input of the artificial mouth, and chain transmission and reception of a telephone set connected respectively to the input of the power amplifier module in the mode of the serial scan settings tract transmission and reception, and the output of the detector is connected to the input of the measuring instrument entered free, made in the form of an extended solid-walled tube extended from both sides of the cross section, one side of which the inner surface is covered with sound-absorbing layer, with the possibility of accommodation, fixation and retention in specified mode of operation of the device at block phone stand between the mouth of artificial and artificial ear so that was performed combining the one hand, the internal surface of which is covered with sound-absorbing layer, through the first annular elastic gasket with a fragment of the frame of the artificial mouth around his sound-emitting surface with a gap between it and the absorbent layer, repeating its shape, and the other side through the second annular elastic gasket with sumpreme the surface of the artificial ear, and deducing from this position to the other the water of the hinged bracket, associated with the housing of the telephone booth and a latched.

When placing the bell section between the mouth of artificial and artificial ear, and to hold this position provides operational check the current status of the test circuits of the device. When applying the CALIBRATION mode from the generator test signal through the block offset and the power amplifier module to mouth artificial electrical signal is generated acoustic signal passing through is free of a particular acoustic load in a certain way affects the microphone artificial ear, causing the electrical signal received at the detector block and after rectification recorded by the measuring instrument. Under certain conditions the calibration form the test signal, the typical amplitude-frequency characteristic of the artificial mouth with permissible deviations from it, the typical amplitude-frequency dependence of the transmission coefficient of the bell section with tolerance and a typical amplitude-frequency response of the ear artificial signal on the measuring device fully defined, uniquely corresponding to the gear ratio of Vindicator "CALIBRATION" demonstrates compliance coefficient signal generator test signal to the indicator set to the values i.e. about the suitability of the measuring paths of the device to the verification of telephones.

Unsuitability of the device to the verification of telephone sets that is determined to the greatest extent care amplitude-frequency characteristics of the artificial mouth and (or) artificial ear, the arrow indicator will be out of sector "CALIBRATION".

Input is free as a constructive element with uniform physical and mechanical properties, insulating acoustic field from the influence of the external environment, provides the sameness and repetition effects from the mouth of the artificial ear artificial regardless of introduced changes in external conditions on the site, including acoustic environment acoustic noise), whereby the signal may be recognized as a truly calibrated.

The input is free, being placed between the artificial mouth and the ear of the artificial, structurally protects sound-emitting surface of the artificial mouth - aperture and sumpreme part of the ear artificial - membrane microphone from mechanical damage outside, check out the telephone device status: transportation, storage.

In block phone stand 4 with elements of the unit to check the phone its microphone, free 7 made in the form of structural element representing a long tube with solid walls increased with both sides 11 and 18 cross-section, with the inner surface 13 of the first side 11 is covered with a sound absorbing layer 14 to provide the opportunity to its placement with the lock in the specified mode of operation at block phone booth between 4 mouth 5 artificial and artificial ear 6 so that was performed combining the first side 11, the internal surface of which 13 are covered with sound-absorbing layer 14, through the first eliminates acoustic leakage of the elastic strip 15 with a fragment of the frame of the artificial mouth 5 around its sound-emitting surface 12 with a gap between it and the absorbent layer 14, repeating its shape, and the second side 18 via the second is i.i.d. 6, and deducing from this position in other modes of operation, storage and transportation, for example, using the adjustable bracket 16, provided with a latch 17 is ensured that the sealing gaskets 15 and 20 with a choice of clearances when fixing the latch on the housing block phone booth 4 when installing the bell section in specified mode of operation, while the output of the generator unit test signal 1 is connected to the input of the corrector test signal 2, the output of which, in turn, through the first circuit of the switching unit 10 is connected to the input of the power amplifier module 3, its output is connected to the input of the artificial mouth 5, and the output of the artificial ear 6 through the second circuit of the switching unit 10 is connected to the input of the detector 8, the output of which is connected to the input of the measuring device 9, thus to check the phone in his chains of transmission and reception in consecutive measurements of parameters of tracts receiving and transmitting, via the switching unit 10 is provided to connect them respectively to the input of the power amplifier module 3 and to the input of the detector 8, which has its output connected to the input of the measuring device 9.

Free can be made of any twere channel of the bell section must have dimensions, providing an exception manifestations of resonances within the operating range checks phone.

Sound-absorbing coating of the inner surface side of the bell section, adjacent to the frame of the artificial mouth, should be made of material having a shape and thickness that provides the lower level reflected from the solid walls of the bell section and the damping own resonances formed by this side of the cavity around the framing of the artificial mouth.

Preparation of the device and its operation is as follows.

Before working in the "CALIBRATION" mode is self-polling the current state of the test circuits device with the assessment of their suitability for testing telephones.

The electrical signal from the block generator test signal 1 is supplied to the error correction block test signal 2 and formed with a given envelope of the spectrum is amplified by the power amplifier module 3 to the required level and through the first circuit of the switching unit 10 is supplied to part of block a phone booth 4 artificial mouth 5, which, creating an acoustic signal through free 7, posted using the adjustable bracket 16 in a simple mucoperiosteum layer 14, through the first gasket 15 is adjacent to the fragment of the frame of the artificial mouth 5 covering the radiating surface 12 of the artificial mouth 5 with a gap between it and the sound absorbing layer 14, and the other side 18 through the second gasket 20 is combined with sumpreme the surface of the artificial ear, fixed with seal without gaps strips 15 and 20, eliminates acoustic leakage, and is held in this position by a latch 17 on the housing block phone booth 4, the effect on the ear artificial 6, which converts the acoustic signal into an electric, coming through the second circuit of the switching unit 10 to the detector block 8 and after rectification by the measuring device 9.

When the health of the measuring paths of the observed readings of the measuring device 9 must comply with the beforehand set when setting values in accordance with the calibration of the measuring paths for self-polling mode.

When installed the suitability of a device for testing telephones, check phone their chains of transmission and reception through the switching unit 10 is connected respectively to the output of the power amplifier module 3 and to the input of the detector 8. Free 7 displays Savelyeva phone oriented so that the microphone cushions were placed against the sound-emitting surface of the artificial mouth 5 at a given distance and at a given angle, and telephone embouchure joined sumpreme the surface of the artificial ear 6.

In test mode transmission path of the telephone electrical signal block generator test signal 1 is supplied to the error correction block test signal 2 and formed with a given envelope of the spectrum is amplified by the power amplifier module 3 to the required level, and then goes on part block a phone booth 4 artificial mouth 5, which converts an electrical signal into an acoustic, which through the open space, free from the bell section 7 acts on the microphone of the phone, causing an electrical signal at the output of the transmission path of the telephone input to the detector block and after rectification by the measuring device 9.

When the health of a transmission path of the phone are observed readings of the measuring instrument 9, which must comply with the beforehand set when setting the unit values in accordance with the calibration of the measuring paths for reserator test signal 1 is supplied to the error correction block test signal 2 and formed with a given envelope is amplified by the power amplifier 3 to the required level, then goes through the corresponding circuit of the switching unit 10 to a circuit path receiving telephone and converted his phone in the acoustic signal is perceived by the ear artificial 6, adjacent the phone embouchure of the microphone of the telephone apparatus, which converts it into an electrical signal input to the detector block 8 and after rectification by the measuring device 9.

When the health of a reception path of the phone are observed readings of the measuring instrument 9, which must comply with the beforehand set when setting the unit values in accordance with the calibration of the measuring paths for the test mode of the reception path.

The introduction of the bell section according to the invention allows to provide a simple way (without additional external to the system control and measuring tools) directly at the workplace checking telephones by self-polling the current state of the test circuits of the system, assessing its suitability for testing telephones while ensuring the persistence of sensitive elements of the sound emitter (artificial mouth), swoopie the STV, mechanical overlying the sensitive elements of acoustic instruments during transportation, storage, which gives a higher reliability of system operation and the duration of its use.

Portable electro-acoustic screening device telephone sets containing block generator test signal, the block offset of the test signal, the power amplifier module, block phone booth, including artificial mouth and the ear of the artificial elements of the installation of the microphone of a telephone, a block detector, measuring device, a switching unit, the output unit generator test signal is connected to the input of the corrector test signal, the output of which through the first circuit of the switching unit is connected to the input of the power amplifier module, which has its output connected to the input of the artificial mouth, the chain of transmission and reception of the phone in the mode of the serial scan path parameters transmission and reception respectively connected to the input of the power amplifier module and to the input of the detector, and the output of the artificial ear through the second circuit of the switching unit is connected to the input of the detector, the output of which is connected to the input of the measuring instrument, with its solid walls of the tube extended from both sides of the section, with the possibility of placing it in position with a combination of one side, the inner surface of which is covered with sound-absorbing layer through the first elastic strip to the segment of the frame of the artificial mouth and the other side through the second elastic gasket with artificial ear, and he was removed from this position by using attached to the bell section of the hinge bracket connected to the housing unit of the telephone stand, and to secure the bracket in position on the block a phone booth installed latch.

 

Same patents:

The invention relates to measurement techniques, in particular to a device for the calibration of hydrophones

The invention relates to a power measurement of the ultrasonic radiation in the water, and biological environments and can be used in industry and medicine

The invention relates to measuring equipment and Metrology and can be used for calibration and calibration of measurement systems, in particular sonar and hydrophysical converters

The invention relates to underwater acoustics and can be used for metrological verification of working measuring instruments (FSW) in situ

The invention relates to the field of hydro-acoustics and can be used to measure parameters of the primary and secondary fields boats

The invention relates to the field of hydro-acoustics and can be used in the calibration and calibration of hydrophones stationary measuring means in the low frequency range (when the wavelength of sound in the order of magnitude is comparable with the depth of the sea)

The invention relates to the field of hydro-acoustics and can be used for calibration and calibration foster hydroacoustic measuring systems, in particular hydroacoustic antennas in the closed narrow hydrocorax in the laboratory and on hydroacoustic the polygons in the natural environment

The invention relates to the field of hydro-acoustics and can be used for calibration of the measuring hydroacoustic antenna arrays in spatial limited hydrocorax

The invention relates to protection devices against unauthorized listening of conversations in the premises and includes, in particular, to devices for protection against eavesdropping devices (bookmarks) using a telephone line as a line for the transmission of information, or as a power source, or as a source of information on the status line for a decision on the inclusion of the listening space

The invention relates to telephones and is a modification of half-duplex speakerphone with microphone, containing attenuators transmission and reception to toggle between the junction of the loudspeaker and microphone from the telephone line

The invention relates to techniques for electrical connection and can be used in telephones and other electrical devices

The invention relates to the management of means of communication

The invention relates to communications, and in particular to target devices of the subscriber telephone network, in particular to wireless phones that work in the standard DEKT, the Technical result is hiding the base station phone

The invention relates to techniques for electronic processing of information and can be used to create rich storage devices, maintenance and use of office and household information, i.e

FIELD: technologies for preventing interception of data.

SUBSTANCE: transferred signal is concealed via adding noises to communication line in speech frequency range with linear addition of speech data signal with noise signal of higher level. Concealment is removed via adaptive filtration of received signal with compensation of noise component and separation of data component. Addition of noises to communication line is performed from the side of sensor. Noise signal during addition of noises and adaptive filtration is formed of a sum of counts of several noise series with nonevent sizes via their random querying. At the beginning of each communication session a signal is sent to side of receiver, characterizing order of querying of series, and starting signal, providing for synchronism of noises addition and filtering processes. All operations are performed by means of microprocessors, mounted on both sides of communication line, dependently of loaded software providing for change of direction of transmission and protection of speech data signal. Invention allows to simplify protection while providing for absolute confidentiality of transmitted data.

EFFECT: higher reliability.

6 cl, 4 dwg

Up!