Hearing aid beam forming test system and test method

Abstract

The invention provides a hearing aid beam forming test system and a test method, and relates to the technical field of acoustic testing, a movable calibration tool is arranged in a test box, and a hearing aid to be tested can be calibrated before being tested, so that the test error of the hearing aid to be tested can be reduced. Moreover, the calibration tool needs to enable the axis of the standard microphone to face the center of the microphone unit of the hearing aid to be tested and control the axis of the standard microphone to be perpendicular to the axis of the standard sound box, so that the influence of the surrounding environment of the hearing aid to be tested on the voice signal can be fully restored. The distance between the standard microphone and the microphone unit of the hearing aid to be tested can be accurately controlled, and the problem that the measurement precision of the performance characteristics of the hearing aid to be tested is indirectly affected due to inaccurate sound field calibration caused by deviation between the standard microphone and the microphone unit of the hearing aid to be tested or non-perpendicular to the axis of a standard sound box is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic testing, and in particular to a hearing aid beamforming testing system and testing method. Background Art

[0002] Numerous research results show that the vast majority of people with hearing loss can benefit from wearing and using hearing aids. Under current medical conditions, hearing aids are an important means to improve their hearing level and quality of life.

[0003] Beamforming is a technology that forms a beam in a specific direction by adjusting the phase and amplitude of the elements in the sensor array. It can control the direction of sound received by the array and has been widely used in many fields. Beamforming of hearing aids means that when the hearing aid is in use, through the collaborative work of multiple microphone arrays, only the sound in a certain direction is picked up, thereby achieving the purpose of speech enhancement. At the same time, spatial filtering can also shield noise interference in non-pickup directions for subsequent noise reduction effect design.

[0004] The beamforming effect is one of the important indicators for measuring the performance of hearing aids. It can help accurately focus on the content you want to hear, weaken the sound from other directions, and enable the wearer to better focus on the conversation. Especially in complex listening environments, beamforming is more demanding.

[0005] Traditional hearing aid test equipment includes a test box, a host, and an LCD display. The host controls the test box to test the hearing aid, and the test results are displayed on the LCD display. However, the hearing aid test equipment does not have a sound field calibration function, which will lead to inaccurate subsequent test results. Summary of the invention

[0006] The present invention provides a hearing aid beamforming test system and a test method, which are used to solve the defects existing in the related art.

[0007] The present invention provides a hearing aid beamforming test system, comprising: a test box, a calibration fixture, a bearing and rotating fixture, a standard sound and a standard microphone, wherein the standard sound is arranged at a preset height on the inner wall of the test box; The calibration fixture is movably disposed in the test box, and is used to align the axis of the standard microphone with the center of the microphone unit of the hearing aid to be tested during calibration, and to control the axis of the standard microphone to be perpendicular to the axis of the standard sound; The bearing rotating fixture is arranged in the test box during testing, and is used to control the microphone unit to face the axis of the standard sound, and drive the coupling cavity including the standard microphone and the moving iron unit of the hearing aid to be tested to rotate.

[0008] According to a hearing aid beamforming test system provided by the present invention, the calibration fixture comprises a lifting slide rail, a supporting crossbar, a first fixing component for fixing the hearing aid to be tested, and a second fixing component for fixing the standard microphone; The lifting slide rail is fixed on the inner wall of the test box; The first fixing member and the second fixing member are both arranged on the supporting cross bar; Both ends of the supporting cross bar are slidably connected to the lifting slide rail.

[0009] According to a hearing aid beamforming test system provided by the present invention, the first fixing component includes a movable clamp and a telescopic spring; The telescopic spring and the movable clamp are both sleeved on the supporting cross bar; The telescopic spring is used to support the movable clamp to fix the hearing aid to be tested.

[0010] According to a hearing aid beamforming test system provided by the present invention, the bearing and rotating fixture comprises a third fixing component, a rotating component, a bearing component and a counting component; The rotating component and the counting component are both fixed on the third fixing component, and the third fixing component is fixed on the supporting cross bar; The bearing component is fixed on the rotating component; The bearing component is used to bear the coupling cavity; The rotating component is used to drive the bearing component to rotate; The counting component is used to determine the rotation angle of the rotating component.

[0011] According to a hearing aid beamforming test system provided by the present invention, a hollow area is provided on the side wall of the bearing component, and a hanger is provided on the side wall of the coupling cavity; The hanging piece is used for hanging in the hollow area.

[0012] The present invention also provides a hearing aid beamforming test method, which is applied to the above-mentioned hearing aid beamforming test system, comprising: During calibration, controlling the standard speaker to emit a calibration audio signal; receiving a first playback signal collected by the standard microphone, and calibrating the first playback signal to obtain a calibration result; During the test, the standard audio system is controlled to emit a test audio signal; the calibration audio signal is collected, amplified, and then played by the hearing aid to be tested; A second playback signal collected by the standard microphone is received, and the hearing aid to be tested is tested based on the second playback signal.

[0013] According to a hearing aid beamforming test method provided by the present invention, the test audio signal is a swept frequency signal; The controlling the standard sound system to emit a test audio signal specifically includes: The bearing rotating fixture is controlled to drive the coupling cavity to step along a fixed direction, and each time the step is performed, the standard audio is controlled to emit the test audio signal.

[0014] According to a hearing aid beamforming test method provided by the present invention, the test audio signal is a first signal sequence; The first signal sequence includes a first blank segment, a first signal segment of a first voice test signal at a first preset sound pressure level mixed with a first noise signal at a second preset sound pressure level, a second blank segment, and a second signal segment of the first voice test signal mixed with an anti-phase noise signal at the second preset sound pressure level; The testing of the hearing aid to be tested based on the second playback signal includes: Based on the second playback signal corresponding to the first signal segment and the second playback signal corresponding to the second signal segment, the speech signal and the noise signal are calculated respectively, and based on the sound pressure level of the speech signal and the sound pressure level of the noise signal, the speech enhancement and noise reduction capability of the hearing aid to be tested is tested.

[0015] According to a hearing aid beamforming test method provided by the present invention, the test audio signal is a second signal sequence; The second signal sequence includes a third blank segment, a second speech test signal segment at a third preset sound pressure level, a fourth blank segment, and a second noise signal segment at the third preset sound pressure level; The testing of the hearing aid to be tested based on the second playback signal includes: The noise gain reduction capability of the hearing aid to be tested is tested based on the second playback signal corresponding to the second speech test signal segment and the second playback signal corresponding to the second noise signal segment.

[0016] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the hearing aid beamforming test method as described above is implemented.

[0017] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the hearing aid beamforming test method as described in any one of the above is implemented.

[0018] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the hearing aid beamforming test method as described in any one of the above is implemented.

[0019] The hearing aid beamforming test system and test method provided by the present invention can be calibrated before testing the hearing aid to be tested by setting a movable calibration fixture in the test box, so that the test error of the hearing aid to be tested can be reduced. Moreover, the calibration fixture needs to align the axis of the standard microphone with the center of the microphone unit of the hearing aid to be tested, and control the axis of the standard microphone to be perpendicular to the axis of the standard sound, which can fully restore the influence of the surrounding environment of the hearing aid to be tested on the voice signal, and can accurately control the distance requirements between the standard microphone and the microphone unit of the hearing aid to be tested, so as to avoid the standard microphone and the microphone unit of the hearing aid to be tested offset or non-perpendicular to the axis of the standard sound, resulting in inaccurate sound field calibration, which indirectly affects the measurement accuracy of the performance characteristics of the hearing aid to be tested. The system can accurately control the distance and angle during the calibration stage, which can effectively avoid the influence of inaccurate calibration on subsequent electroacoustic performance tests, and further improve the accuracy of the test results of the hearing aid to be tested. The load-bearing rotating fixture controls the microphone unit to face the axis of the standard sound, and drives the coupling cavity containing the standard microphone and the moving iron unit of the hearing aid to be tested to rotate, which can ensure that the microphone unit faces the axis of the standard sound at every angle. By automatically driving the coupling cavity to rotate, manpower can be released and test efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is one of the structural schematic diagrams of the hearing aid beamforming test system provided by the present invention during calibration.

[0022] Figure 2 This is one of the structural schematic diagrams of the hearing aid beamforming test system provided by the present invention during measurement.

[0023] Figure 3 This is the second structural schematic diagram of the hearing aid beamforming test system provided by the present invention during calibration.

[0024] Figure 4 It is a schematic diagram of the internal structure of a test box in the hearing aid beamforming test system provided by the present invention.

[0025] Figure 5 This is the second structural schematic diagram of the hearing aid beamforming test system provided by the present invention during measurement.

[0026] Figure 6 This is the third structural schematic diagram of the hearing aid beamforming test system provided by the present invention during calibration.

[0027] Figure 7 This is the fourth structural schematic diagram of the hearing aid beamforming test system provided by the present invention during calibration.

[0028] Figure 8 It is a schematic diagram of the planar structure of the hearing aid beamforming test system provided by the present invention at a preset height during calibration.

[0029] Fig. 9 This is the third structural schematic diagram of the hearing aid beamforming test system provided by the present invention during measurement.

[0030] Fig.10 This is the fourth structural schematic diagram of the hearing aid beamforming test system provided by the present invention during measurement.

[0031] Fig.11 This is the fifth structural schematic diagram of the hearing aid beamforming test system provided by the present invention during measurement.

[0032] Fig.12 It is a flow chart of the hearing aid beamforming testing method provided by the present invention.

[0033] Fig.13 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Since existing hearing aid test equipment does not have a sound field calibration function, this will lead to inaccurate subsequent test results. To this end, an embodiment of the present invention provides a hearing aid beamforming test system.

[0036] Figure 1 This is one of the structural schematic diagrams of a hearing aid beamforming test system provided in an embodiment of the present invention. Figure 2 FIG2 is a second structural diagram of a hearing aid beamforming test system provided in an embodiment of the present invention. Figure 1and Figure 2 As shown, the hearing aid beamforming test system includes: a test box 1, a calibration fixture 3, a bearing rotation fixture 4, a standard speaker 2 and a standard microphone 5, wherein the standard speaker 2 is arranged at a preset height on the inner wall of the test box 1.

[0037] The calibration fixture 3 is movably disposed in the test box 1 , and is used to align the axis of the standard microphone 5 with the center of the microphone unit 61 of the hearing aid 6 to be tested during calibration, and to control the axis of the standard microphone 5 to be perpendicular to the axis of the standard speaker 2 .

[0038] The bearing rotating fixture 4 is arranged in the test box 1 during testing, and is used to control the microphone unit 61 to face the axis of the standard sound 2, and drive the coupling cavity 7 including the standard microphone 5 and the moving iron unit 62 of the hearing aid 6 to rotate.

[0039] Specifically, the hearing aid beamforming test system provided in the embodiment of the present invention may include: a test box 1, a calibration fixture 3, a bearing rotation fixture 4, a standard sound 2 and a standard microphone 5. The test box 1 may be a shielded box that can meet the requirements of sound insulation, vibration reduction, sound absorption, free field, etc., has high portability, and can enhance the applicability in complex noise environments.

[0040] The standard sound box 2 may be a loudspeaker, and the standard sound box 2 may be arranged at a preset height on the inner wall of the test box 1. The preset height may be set as required, and is not specifically limited here.

[0041] During calibration, the hearing aid beamforming test system includes a test box 1, a calibration fixture 3, a standard sound 2, and a standard microphone 5, but does not include a bearing rotating fixture 4. At this time, the internal three-dimensional structure of the test box 1 can be as follows: Figure 3 As shown, the standard microphone 5 is not shown.

[0042] The inner wall of the test box 1 is a layer of glass fiber crest cotton, and the side wall section of the test box 1 is as follows: Figure 4 As shown, it includes seven layers from the inside to the outside, which are glass fiber crest wool, glass fiber wool, medium density board, sound insulation pad, damping layer, damping layer and aluminum plate, so as to achieve the purpose of sound insulation, vibration reduction and sound absorption. Among them, the thickness of each layer can be set as needed, for example, the thickness of glass fiber crest wool is 120mm, the thickness of glass fiber wool is 10mm, the thickness of medium density board is 10mm, the thickness of sound insulation pad is 3mm, the thickness of damping layer and damping layer are both 2mm, and the thickness of aluminum plate is 10mm.

[0043] The calibration fixture 3 is movably disposed in the test box 1. During calibration, the calibration fixture 3 can align the axis of the standard microphone 5 with the center of the microphone unit 61 of the hearing aid 6 to be tested, and can move the height of the standard microphone 5 and the microphone unit 61 to a preset height so that the axis of the standard microphone 5 is perpendicular to the axis of the standard speaker 2.

[0044] The microphone unit 61 of the hearing aid 6 to be tested may include one microphone or a microphone array consisting of a plurality of microphones. When the microphone unit 61 includes one microphone, the center of the microphone unit 61 is the center of the microphone; when the microphone unit 61 includes a microphone array, the center of the microphone unit 61 is the center of the microphone array.

[0045] During calibration, the standard speaker 2 can play a calibration audio signal, which is received by the standard microphone 5. The standard microphone 5 can be connected to a signal processing unit, and the standard microphone 5 can transmit the received signal to the signal processing unit. The signal processing unit can complete the calibration by processing and analyzing the received signal and then performing sound pressure compensation.

[0046] It is understandable that the calibration audio signal can be any speech signal, for example, the International Speech Test Signal (ISTS). Sound pressure compensation refers to compensating for sound pressure changes caused by environmental or equipment factors by adjusting the gain of the amplified received signal, thereby ensuring the stability of the amplified received signal and its consistency with the calibration audio signal.

[0047] The signal processing unit may include a measuring amplifier, an audio acquisition card, and an analysis module. The measuring amplifier is used to amplify the received signal. The audio acquisition card is used to collect the amplified received signal and transmit it to the analysis module. The analysis module performs sound pressure compensation in combination with the sound pressure level of the calibration audio signal. The analysis module may be an intelligent device, such as a local computer, a smart phone, a tablet computer, etc.

[0048] During the test, the test box 1 includes a test box 1, a rotating support 4, a standard sound 2 and a standard microphone 5. At this time, the internal three-dimensional structure of the test box 1 can be as follows Figure 5 As shown, the standard microphone 5 is not shown.

[0049] The bearing rotating fixture 4 is set in the test box 1 during the test, and the microphone unit 61 can be controlled to face the axis of the standard sound 2 by setting the fixed position of the hearing aid 6 to be tested on the bearing rotating fixture 4. At the same time, the bearing rotating fixture 4 can be driven by a stepper motor, and the coupling cavity 7 containing the standard microphone 5 and the moving iron unit 62 of the hearing aid 6 to be tested can be driven to rotate by rotation. In the coupling cavity 7, the standard microphone 5 can be coupled with the moving iron unit 62 of the hearing aid 6 to be tested.

[0050] During the test, the coupling cavity 7 is rotated to each angle by the bearing rotating fixture 4, and the standard speaker 2 can emit a test audio signal, which is collected and amplified by the microphone unit 61 of the hearing aid to be tested and then played through the moving iron unit 62. The standard microphone 5 collects the playback signal of the moving iron unit 62 in the coupler 7 and transmits it to the signal processing unit.

[0051] It is understandable that the test audio signal can be determined according to the ability of the hearing aid to be tested, for example, it can be different types of signals such as sine, speech, noise, etc. Then, the signal processing unit tests the playback signal of the moving iron unit 62 in combination with the calibration result to verify the speech enhancement noise reduction ability, noise gain reduction ability and sound pickup ability of the hearing aid to be tested at various angles.

[0052] The hearing aid beamforming test system provided in the embodiment of the present invention includes: a test box, a calibration fixture, a bearing rotating fixture, a standard sound and a standard microphone, wherein the standard sound is arranged at a preset height on the inner wall of the test box. By arranging a movable calibration fixture in the test box, calibration can be performed before testing the hearing aid to be tested, so that the test error of the hearing aid to be tested can be reduced. Moreover, the calibration fixture needs to align the axis of the standard microphone with the center of the microphone unit of the hearing aid to be tested, and control the axis of the standard microphone to be perpendicular to the axis of the standard sound, which can fully restore the influence of the surrounding environment of the hearing aid to be tested on the voice signal, and can accurately control the distance requirements between the standard microphone and the microphone unit of the hearing aid to be tested, so as to avoid the standard microphone and the microphone unit of the hearing aid to be tested offset or non-perpendicular to the axis of the standard sound, resulting in inaccurate sound field calibration, which indirectly affects the measurement accuracy of the performance characteristics of the hearing aid to be tested. The system can accurately control the distance and angle during the calibration stage, which can effectively avoid the influence of inaccurate calibration on subsequent electroacoustic performance testing, and further improve the accuracy of the test results of the hearing aid to be tested. The load-bearing rotating fixture controls the microphone unit to face the axis of the standard sound, and drives the coupling cavity containing the standard microphone and the moving iron unit of the hearing aid to be tested to rotate, which can ensure that the microphone unit faces the axis of the standard sound at every angle. By automatically driving the coupling cavity to rotate, manpower can be released and test efficiency can be improved.

[0053] Based on the above embodiments, Figure 6 As shown, the calibration fixture 3 includes a lifting slide rail 3-5, a supporting crossbar 3-8, a first fixing component for fixing the hearing aid 6 to be tested, and a second fixing component for fixing the standard microphone 3-7; The lifting rails 3-5 are fixed on the inner wall of the test box 1; The first fixing member and the second fixing member are both arranged on the supporting cross bar 3-8; Both ends of the supporting cross bar 3-8 are slidably connected to the lifting slide rail 3-5.

[0054] Specifically, the calibration fixture 3 may further include a support frame 3 - 1 , and the support frame 3 - 1 may be fixed on the inner wall of the test box 1 .

[0055] The lifting rail 3 - 5 can be fixed on the support frame 3 - 1 , and then fixed on the inner wall of the test box 1 through the support frame 3 - 1 .

[0056] like Figure 7 As shown, both ends of the support cross bar 3-8 are slidably connected to the lifting slide rail 3-5, so that the support cross bar 3-8 can adjust the height in the test box 1 by sliding to reach a preset height.

[0057] A positioning pin 3-6 may be provided on the supporting cross bar 3-8, and the positioning pin 3-6 is opposite to the standard speaker 2, and is used to position the microphone unit 61 of the hearing aid 6 to be tested and the standard microphone 3-7. When the supporting cross bar 3-8 reaches a preset height, the centers of the microphone unit 61 and the standard microphone 3-7 are opposite to the standard speaker 2.

[0058] A first fixing component is provided on the left side of the supporting crossbar 3-8 for fixing the hearing aid to be tested, and a second fixing component is provided on the right side of the supporting crossbar 3-8, which may be, for example, a standard microphone tube 3-2 for fixing a standard microphone 3-7.

[0059] In the embodiment of the present invention, the calibration fixture can be used to quickly adjust the center of the microphone unit and the standard microphone to face the standard sound, thereby improving the calibration efficiency. Moreover, the calibration fixture has a simple structure and is easy to adjust, which can reduce the difficulty of calibration.

[0060] Based on the above embodiments, Figure 6 As shown, the first fixing component includes a movable clamp 3-4 and a telescopic spring 3-3; The telescopic spring 3-3 and the movable clamp 3-4 are both sleeved on the supporting cross bar 3-8; The telescopic spring 3 - 3 is used to support the movable clamp 3 - 4 to fix the hearing aid 6 to be tested.

[0061] Specifically, the telescopic spring 3 - 3 can control the distance between the movable clamps 3 - 4 , so that the hearing aid 6 to be tested can be fixed between the movable clamps 3 - 4 .

[0062] In the embodiment of the present invention, the first fixing component has a simple structure and can stably fix the hearing aid to be tested.

[0063] Based on the above embodiment, the structure at the preset height in the test box 1 is as follows: Figure 8 As shown, Figure 8 The positions of the positioning pins 3-6 are not shown. Figure 8 In the figure, the standard microphone 5 includes a microphone head 5-1 and a preamplifier 5-2. The microphone head 5-1 is directly opposite to the center 61-1 of the microphone unit 61, and the distance between the two can be 5mm±3mm. At the same time, the center 61-1 of the microphone unit 61 is on the axis of the standard speaker 2 and directly opposite to the standard speaker 2.

[0064] The moving iron unit 62 of the hearing aid 6 to be tested can be connected to the coupling cavity 7 through the guide tube 7 - 1 .

[0065] On the basis of the above embodiment, the load-bearing rotating fixture comprises a third fixed component, a rotating component, a load-bearing component and a counting component; The rotating component and the counting component are both fixed on the third fixing component, and the third fixing component is fixed on the supporting cross bar; The bearing component is fixed on the rotating component; The bearing component is used to bear the coupling cavity; The rotating component is used to drive the bearing component to rotate; The counting component is used to determine the rotation angle of the rotating component.

[0066] Specifically, Fig. 9 and Fig.10 As shown, the third fixing component 4 - 9 that carries the rotating fixture 4 can be fixed on the supporting crossbar 3 - 8 .

[0067] The bearing component may include a supporting screw 4-1, a sleeve 4-2 and a connecting screw 4-4. The supporting screw 4-1 may be used to support the microphone unit 61 of the hearing aid 6 to be tested. Fig.11 The sleeve 4-2 is used to carry the coupling cavity 4-7. Fig. 9 In the figure, a standard microphone 4-8 is fixed in the coupling cavity 4-7.

[0068] The bearing component can be fixed on the rotating component. The rotating component can include a turntable 4-5, and the turntable 4-5 can drive the supporting screw 4-1 and the sleeve 4-2 to rotate through the connecting screw 4-4, thereby rotating the hearing aid 6 to be tested.

[0069] The counting member may include a dial 4-6 for determining the rotation angle of the rotating member.

[0070] Based on the above embodiments, Fig. 9 and Fig.10 As shown, a hollow area 4-3 is provided on the side wall of the bearing component, and a hanger 4-10 is provided on the side wall of the coupling cavity 4-7; The hanging piece 4-10 is used to be hung on the hollow area 4-3, so that the coupling cavity 4-7 can be fixed on the sleeve 4-2 of the bearing component.

[0071] like Fig.11 As shown, based on the above embodiment, an embodiment of the present invention further provides a hearing aid beamforming test method, which is applied to the above hearing aid beamforming test system, including: S1, during calibration, controlling the standard speaker to emit a calibration audio signal; S2, receiving a first playback signal collected by the standard microphone, and calibrating the first playback signal to obtain a calibration result; S3, during the test, the standard audio is controlled to emit a test audio signal; the calibration audio signal is collected, amplified and then played by the hearing aid to be tested; S4, receiving a second playback signal collected by the standard microphone, and testing the hearing aid to be tested based on the second playback signal.

[0072] Specifically, an embodiment of the present invention further provides a hearing aid beamforming test method, which is applied to the above-mentioned hearing aid beamforming test system. The executor of the method is a signal processing unit, which may include a measurement amplifier, an audio acquisition card, an analysis module, etc.

[0073] First, step S1 is performed. During calibration, the structural diagram of the hearing aid beamforming test system is as follows: Figure 3 As shown, the standard sound is controlled to emit a calibration audio signal. The calibration audio signal is collected by a standard microphone in the hearing aid beamforming test system.

[0074] Then, step S2 is performed to receive the first playback signal collected by the standard microphone, and the first playback signal is amplified and collected and then calibrated to obtain a calibration result. The calibration is sound pressure compensation, and the calibration result can be a sound pressure compensation value.

[0075] Thereafter, step S3 is executed. During the test, the structural diagram of the hearing aid beamforming test system is as follows: Figure 4 As shown, the standard sound is controlled to emit a test audio signal. The calibration audio signal is collected and amplified by the microphone unit of the hearing aid to be tested and then played through the moving iron unit of the hearing aid to be tested.

[0076] The standard microphone is coupled to the moving iron unit of the hearing aid to be tested in the coupling cavity to collect the second playback signal played by the moving iron unit of the hearing aid to be tested.

[0077] At the same time, the bearing rotating fixture can drive the coupling cavity to rotate, and thus the second playback signal can include the second playback signal at various angles.

[0078] Finally, step S4 is executed to receive the second playback signal collected by the standard microphone, and the second playback signal is used to test the hearing aid to be tested. For example, the coupling cavity can be driven to rotate by a bearing rotating fixture to test the speech enhancement noise reduction capability, noise gain reduction capability, and sound pickup capability of the hearing aid to be tested at various angles.

[0079] The hearing aid beamforming test method provided in the embodiment of the present invention can be calibrated before testing the hearing aid to be tested, so that the test error of the hearing aid to be tested can be reduced. Moreover, by calibrating the axis of the standard microphone to be directly opposite to the center of the microphone unit of the hearing aid to be tested, and controlling the axis of the standard microphone to be perpendicular to the axis of the standard sound, the influence of the surrounding environment of the hearing aid to be tested on the voice signal can be fully restored, and the distance requirements between the standard microphone and the microphone unit of the hearing aid to be tested can be accurately controlled to avoid the standard microphone and the microphone unit of the hearing aid to be tested offset or non-perpendicular to the axis of the standard sound, resulting in inaccurate sound field calibration, which indirectly affects the measurement accuracy of the performance characteristics of the hearing aid to be tested. The distance and angle can be accurately controlled in the calibration stage, which can effectively avoid the influence of inaccurate calibration on subsequent electroacoustic performance tests, and further improve the accuracy of the test results of the hearing aid to be tested. By controlling the microphone unit to be directly opposite to the axis of the standard sound by the bearing rotating fixture, and driving the coupling cavity containing the standard microphone and the moving iron unit of the hearing aid to be tested to rotate, it can be ensured that the microphone unit is directly opposite to the axis of the standard sound at each angle. By automatically driving the coupling cavity to rotate by carrying the rotating fixture, manpower can be released and test efficiency can be improved.

[0080] Based on the above embodiment, the test audio signal is a frequency sweep signal; The controlling the standard sound system to emit a test audio signal specifically includes: The bearing rotating fixture is controlled to drive the coupling cavity to step along a fixed direction, and each time the step is performed, the standard audio is controlled to emit the test audio signal.

[0081] Specifically, the test audio signal used in the embodiment of the present invention is a frequency sweep signal. The execution subject can control the bearing rotating fixture to drive the coupling cavity to step along a fixed direction. Each time it steps, the standard sound is controlled to emit a frequency sweep signal. The frequency sweep signal is collected and amplified by the microphone unit of the hearing aid to be tested and then broadcasted through the moving iron unit. The standard microphone is coupled with the moving iron unit in the coupling cavity to collect the second playback signal played by the moving iron unit.

[0082] Therefore, the second playback signal can be spectrally analyzed to obtain the spectrum of the second playback signal, which is the relationship between frequency and sensitivity. Then, the hearing aid to be tested can be tested to determine the sound pickup ability of the microphone unit of the hearing aid to be tested at various angles, that is, the sensitivity or directionality.

[0083] In the embodiment of the present invention, the sound pickup capability of the microphone unit of the hearing aid to be tested at various angles can be realized by carrying the rotating fixture and the sweep frequency signal.

[0084] Based on the above embodiment, the test audio signal is a first signal sequence; The first signal sequence includes a first blank segment, a first signal segment of a first voice test signal at a first preset sound pressure level mixed with a first noise signal at a second preset sound pressure level, a second blank segment, and a second signal segment of the first voice test signal mixed with an anti-phase noise signal at the second preset sound pressure level; The testing of the hearing aid to be tested based on the second playback signal includes: Based on the second playback signal corresponding to the first signal segment and the second playback signal corresponding to the second signal segment, the speech signal and the noise signal are calculated respectively, and based on the sound pressure level of the speech signal and the sound pressure level of the noise signal, the speech enhancement and noise reduction capability of the hearing aid to be tested is tested.

[0085] Specifically, the test audio signal is a first signal sequence, which may include a first blank segment, a first signal segment of a first voice test signal of a first preset sound pressure level mixed with a first noise signal of a second preset sound pressure level, a second blank segment, and a second signal segment of a first voice test signal mixed with an inverted noise signal of a second preset sound pressure level. The lengths of the first blank segment and the second blank segment may be the same, for example, both may be 5s. The lengths of the first signal segment and the second signal segment may be the same, for example, both may be 60s. The first preset sound pressure level may be 70dB SPL, and the second preset sound pressure level may be 68dB SPL. The first voice test signal may be an ISTS, or other voice signals, which are not specifically limited here.

[0086] In addition, after the second signal segment, the first signal sequence can also be connected to a third signal segment of an inverted first speech test signal of a first preset sound pressure level mixed with an inverted first noise signal of a second preset sound pressure level through a 5s blank segment, and the third signal segment can also be followed by a 5s blank segment.

[0087] Thereafter, when the hearing aid to be tested is tested using the second playback signal, the speech signal and the noise signal can be calculated using the second playback signal corresponding to the first signal segment and the second playback signal corresponding to the second signal segment. The second playback signal corresponding to the first blank segment can be represented as y11, the second playback signal corresponding to the first signal segment can be represented as y12, the second playback signal corresponding to the second blank segment can be represented as y13, and the second playback signal corresponding to the second signal segment can be represented as y14.

[0088] The second playback signal corresponding to the 5s blank segment after the second signal segment can be expressed as y15, and the second playback signal corresponding to the third signal segment can be expressed as y16.

[0089] The speech signal can be expressed as s=1 / 2(y12+y14), and the noise signal can be expressed as n=1 / 2(y12-y14).

[0090] The sound pressure level Ls of the speech signal s and the sound pressure level Ln of the noise signal n are calculated. The difference between Ls and Ln is the output signal-to-noise ratio (SNR) of the hearing aid to be tested.

[0091] The difference between the output SNR of the hearing aid to be tested and the input signal SNR is calculated as the speech enhancement and noise reduction capability of the hearing aid to be tested at that angle.

[0092] Optionally, the verification signal may be calculated using the second playback signal corresponding to the first signal segment and the second playback signal corresponding to the third signal segment, that is, v=1 / 2(y12+y16).

[0093] Calculate the sound pressure level Lv of the test signal v. Theoretically, Lv should be 10 dB lower than Ls and Ln to ensure signal alignment.

[0094] Based on the above embodiment, the test audio signal is a second signal sequence; The second signal sequence includes a third blank segment, a second speech test signal segment at a third preset sound pressure level, a fourth blank segment, and a second noise signal segment at the third preset sound pressure level; The testing of the hearing aid to be tested based on the second playback signal includes: The noise gain reduction capability of the hearing aid to be tested is tested based on the second playback signal corresponding to the second speech test signal segment and the second playback signal corresponding to the second noise signal segment.

[0095] Specifically, the noise reduction function of the hearing aid to be tested may also be activated to test the noise gain reduction capability of the hearing aid to be tested.

[0096] At this time, the standard audio system can play a second signal sequence, which includes a third blank segment, a second voice test signal segment at a third preset sound pressure level, a fourth blank segment, and a second noise signal segment at the third preset sound pressure level.

[0097] The second noise signal segment may be followed by a blank segment of 5 seconds.

[0098] The lengths of the third blank segment and the fourth blank segment may be the same, for example, both may be 5 seconds.

[0099] The third preset sound pressure level may be the same as the first preset sound pressure level, and both may be 70 dB SPL.

[0100] When the hearing aid to be tested is tested using the second playback signal, the noise gain reduction capability of the hearing aid to be tested can be tested using the second playback signal corresponding to the second speech test signal segment and the second playback signal corresponding to the second noise signal segment.

[0101] The second playback signal corresponding to the third blank segment can be expressed as y21, the second playback signal corresponding to the second voice test signal segment can be expressed as y22, the second playback signal corresponding to the fourth blank segment can be expressed as y23, and the second playback signal corresponding to the second noise signal segment can be expressed as y24.

[0102] Calculate the sound pressure levels of y22 and y24 to obtain L2 and L4 respectively. The difference between L2 and L4 is the noise gain reduction capability of the hearing aid to be tested at this angle.

[0103] Fig.13 An example of a physical structure diagram of an electronic device is shown in FIG. Fig.13 As shown, the electronic device may include: a processor 110, a communication interface 120, a memory 130 and a communication bus 140, wherein the processor 110, the communication interface 120 and the memory 130 communicate with each other through the communication bus 140. The processor 110 may call the logic instructions in the memory 130 to execute the hearing aid beamforming test method provided in the above embodiments.

[0104] In addition, the logic instructions in the above-mentioned memory 130 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the relevant technology or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0105] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the hearing aid beamforming test method provided in the above embodiments.

[0106] In yet another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the hearing aid beamforming test method provided in the above embodiments.

[0107] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hearing aid beamforming test system, characterized in that: include: A test box, a calibration fixture, a bearing and rotating fixture, a standard speaker and a standard microphone, wherein the standard speaker is arranged at a preset height on the inner wall of the test box; The calibration fixture is movably disposed in the test box, and is used to align the axis of the standard microphone with the center of the microphone unit of the hearing aid to be tested during calibration, and to control the axis of the standard microphone to be perpendicular to the axis of the standard sound; The bearing rotating fixture is arranged in the test box during testing, and is used to control the microphone unit to face the axis of the standard sound, and drive the coupling cavity including the standard microphone and the moving iron unit of the hearing aid to be tested to rotate.

2. The hearing aid beamforming test system according to claim 1, characterized in that: The calibration fixture comprises a lifting slide rail, a supporting crossbar, a first fixing component for fixing the hearing aid to be tested, and a second fixing component for fixing the standard microphone; The lifting slide rail is fixed on the inner wall of the test box; The first fixing member and the second fixing member are both arranged on the supporting cross bar; Both ends of the supporting cross bar are slidably connected to the lifting slide rail.

3. The hearing aid beamforming test system according to claim 2, characterized in that: The first fixing component includes a movable clamp and a telescopic spring; The telescopic spring and the movable clamp are both sleeved on the supporting cross bar; The telescopic spring is used to support the movable clamp to fix the hearing aid to be tested.

4. The hearing aid beamforming test system according to claim 2, characterized in that: The load-bearing rotating fixture comprises a third fixed component, a rotating component, a load-bearing component and a counting component; The rotating component and the counting component are both fixed on the third fixing component, and the third fixing component is fixed on the supporting cross bar; The bearing component is fixed on the rotating component; The bearing component is used to bear the coupling cavity; The rotating component is used to drive the bearing component to rotate; The counting component is used to determine the rotation angle of the rotating component.

5. The hearing aid beamforming test system according to claim 4, characterized in that: A hollow area is provided on the side wall of the bearing component, and a hanging piece is provided on the side wall of the coupling cavity; The hanging piece is used for hanging in the hollow area.

6. A hearing aid beamforming test method, characterized in that: A hearing aid beamforming test system as claimed in any one of claims 1 to 5, comprising: During calibration, controlling the standard speaker to emit a calibration audio signal; receiving a first playback signal collected by the standard microphone, and calibrating the first playback signal to obtain a calibration result; During the test, the standard audio system is controlled to emit a test audio signal; the calibration audio signal is collected, amplified, and then played by the hearing aid to be tested; A second playback signal collected by the standard microphone is received, and the hearing aid to be tested is tested based on the second playback signal.

7. The hearing aid beamforming test method according to claim 6, characterized in that: The test audio signal is a frequency sweep signal; The controlling the standard sound system to emit a test audio signal specifically includes: The bearing rotating fixture is controlled to drive the coupling cavity to step along a fixed direction, and each time the step is performed, the standard audio is controlled to emit the test audio signal.

8. The hearing aid beamforming test method according to claim 6, characterized in that: The test audio signal is a first signal sequence; The first signal sequence includes a first blank segment, a first signal segment of a first voice test signal at a first preset sound pressure level mixed with a first noise signal at a second preset sound pressure level, a second blank segment, and a second signal segment of the first voice test signal mixed with an anti-phase noise signal at the second preset sound pressure level; The testing of the hearing aid to be tested based on the second playback signal includes: Based on the second playback signal corresponding to the first signal segment and the second playback signal corresponding to the second signal segment, the speech signal and the noise signal are calculated respectively, and based on the sound pressure level of the speech signal and the sound pressure level of the noise signal, the speech enhancement and noise reduction capability of the hearing aid to be tested is tested.

9. The hearing aid beamforming test method according to claim 6, characterized in that: The test audio signal is a second signal sequence; The second signal sequence includes a third blank segment, a second speech test signal segment at a third preset sound pressure level, a fourth blank segment, and a second noise signal segment at the third preset sound pressure level; The testing of the hearing aid to be tested based on the second playback signal includes: The noise gain reduction capability of the hearing aid to be tested is tested based on the second playback signal corresponding to the second speech test signal segment and the second playback signal corresponding to the second noise signal segment.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the hearing aid beamforming testing method according to any one of claims 6 to 9 is implemented.

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