Test equipment and test method

Abstract

The invention belongs to the technical field of audio testing, and particularly relates to testing equipment and a testing method. The test equipment is used for detecting a sound pickup device, the test equipment comprises a test sound source spaced from the sound pickup device, a sealing structure connected between the sound pickup device and the test sound source, and a detection structure in communication connection with the sound pickup device, and the test sound source is used for releasing a sound signal to the sound pickup device. The sealing structure is provided with a closed sealing cavity, two ends of the sealing cavity are respectively communicated with the sound pickup device and the test sound source so as to form a pressure field environment between the sound pickup device and the test sound source, the sound pickup device receives the sound signal and then generates a to-be-tested signal, and the to-be-tested signal is sent to the test sound source. The detection structure is used for detecting the signal to be detected. The test efficiency can be improved, and the test cost can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of audio testing, and in particular relates to a testing device and a testing method. Background Art

[0002] With the rapid development of information technology, mobile phones and other terminal devices are becoming more and more common in human life, which has greatly promoted the improvement of human life quality. Microphones are the core audio devices of terminal devices. The acoustic performance of microphones is closely related to the realization of voice interaction functions, and their sound quality directly affects user experience. Therefore, testing the performance of microphones in terminal devices is an indispensable part of the product development process.

[0003] At present, when testing the acoustic performance of a microphone, the device under test and the test sound source need to be placed in a soundproof box. The microphone of the device under test is aimed at the test sound source to receive the test signal. The function of the soundproof box is to isolate external noise and provide a free field environment. However, the use of the soundproof box increases the complexity and cost of the test equipment. In addition, in order to avoid mutual interference between the devices under test during the test, the devices under test can only be grabbed by a robot one by one into the soundproof box for testing. After the test is completed, the device under test is taken out and put into another device under test. The steps are cumbersome, resulting in low test efficiency. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a testing device and a testing method, aiming to solve the problem of how to improve testing efficiency and reduce testing costs.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In a first aspect, a test device is provided for detecting a sound pickup device, the test device comprising a test sound source spaced apart from the sound pickup device, a sealing structure connected between the sound pickup device and the test sound source, and a detection structure communicatively connected to the sound pickup device, the test sound source being used to transmit a sound signal to the sound pickup device, the sealing structure having a sealed sealed cavity, the two ends of the sealed cavity being respectively connected to the sound pickup device and the test sound source to form a pressure field environment between the sound pickup device and the test sound source, the sound pickup device generating a signal to be tested after receiving the sound signal, and the detection structure being used to detect the signal to be tested.

[0007] In some embodiments, the sealing structure includes a sealing block having a first cavity and a conductive tube having a second cavity. The sealing block is connected to the conductive tube so that the first cavity and the second cavity are connected to form the sealed cavity. The sealing block is in airtight contact with the pickup device, and the test sound source is in airtight contact with one end of the conductive tube facing away from the sealing block.

[0008] In some embodiments, the test sound source includes a main body and a sound outlet hole arranged on the side of the main body facing the sound pickup device, the sound outlet hole is used to emit the sound signal, and the end of the conductive tube facing away from the sealing block is plugged into the sound outlet hole to connect the second cavity with the sound outlet hole.

[0009] In some embodiments, the sealing block includes a clamping portion and an inserting portion connected to each other, the clamping portion is provided with a clamping slot on the end surface facing the pickup device, the pickup device is clamped in the clamping slot, and the inserting portion is plugged and fixed to the opening of the conductive tube.

[0010] In some embodiments, the test equipment also includes a driving structure arranged next to the sound pickup device, the test sound source is arranged on the driving structure and the sound outlet hole faces the sound pickup device, the sealing structure is detachably connected to the sound outlet hole, and the driving structure is used to drive the test sound source to move along a first direction so that the sealing structure is in contact with or separated from the sound pickup device.

[0011] In some embodiments, the testing equipment also includes a conveyor line and a carrier arranged on the conveyor line, the carrier is used to fix the sound pickup device, the driving structure is arranged next to the conveyor line, and the conveyor line is used to transport the carrier along a second direction so that the sound pickup device moves to a preset position and docks with the driving structure.

[0012] In some embodiments, the conveyor line has a lifting channel, and the lifting channel passes through the conveying surface of the conveyor line. The testing equipment also includes a lifting structure arranged in the lifting channel, and the lifting structure is used to drive the carrier to lift and lower relative to the conveying surface so that the pickup device can detach from the conveying surface and move to a preset height or fall on the conveying surface.

[0013] In some embodiments, a plurality of the conveying lines are arranged at intervals, and each of the conveying lines is correspondingly provided with a plurality of the test sound sources.

[0014] In some embodiments, the test device includes an audio generating component and a power amplifier, wherein the audio generating component is used to generate the sound signal, and the power amplifier is communicatively connected to the audio generating component and the test sound source, and the power amplifier is used to amplify the power of the sound signal generated by the audio generating component and transmit it to the test sound source.

[0015] In a second aspect, a testing method is provided, which is implemented by the above-mentioned testing device and includes the following steps:

[0016] Connect the sealing structure between the pickup device and the test sound source;

[0017] The test sound source emits a sound signal, and the sound signal is transmitted to the sound pickup device after passing through the sealed cavity;

[0018] The sound pickup device converts the received sound signal into a signal to be tested and transmits it to the detection structure;

[0019] The detection structure detects the signal to be detected.

[0020] The test equipment provided by the present application forms a closed pressure field environment by setting a sealing structure between the test sound source and the sound pickup device, wherein both ends of the sealing cavity of the sealing structure are connected to the sound pickup device and the test sound source respectively, thereby effectively preventing the leakage of sound waves, concentrating the sound pressure around the sound pickup device, and ensuring that the sound pressure in the test environment is uniform. Therefore, there is no need to set up a dedicated sound insulation box, which can save costs. In addition, the present application can directly fit the sealing structure and the sound pickup device for testing, which is simple to operate and eliminates the steps of putting the sound pickup device in and out of the sound insulation box one by one, thus simplifying the operation process, saving a lot of time, and effectively improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the test device provided in the embodiment of the present application;

[0023] Figure 2 It is a partial structural schematic diagram of the testing device provided in the embodiment of the present application;

[0024] Figure 3 is a schematic diagram of a partial cross-section structure of a test device provided in an embodiment of the present application;

[0025] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure of part A;

[0026] Figure 5 It is a schematic diagram of a partial split structure of a testing device provided in an embodiment of the present application;

[0027] Figure 6 yes Figure 5 A schematic diagram of the structure from another perspective;

[0028] Figure 7 It is a flow chart of the testing method provided in the embodiment of the present application.

[0029] Among them, the reference numerals in the figure are:

[0030] 10. Test sound source; 11. Sound outlet hole; 12. Main body; 20. Sealing structure; 21. Sealing block; 211. Clamping part; 212. Inserting part; 213. First cavity; 22. Conducting tube; 221. Second cavity; 30. Detection structure; 60. Driving structure; 71. Transmission line; 711. First line body; 712. Second line body; 72. Carrier; 80. Lifting structure; 90. Resistance structure; 200. Sound pickup device; 300. Sealed cavity. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] See also Figures 1 to 6 The embodiment of the present application provides a test device for detecting a sound pickup device 200. The test device includes a test sound source 10 spaced apart from the sound pickup device 200, a sealing structure 20 connected between the sound pickup device 200 and the test sound source 10, and a detection structure 30 communicatively connected to the sound pickup device 200. The test sound source 10 is used to transmit a sound signal to the sound pickup device 200. The sealing structure 20 has a sealed sealing cavity 300. Both ends of the sealed cavity 300 are respectively connected to the sound pickup device 200 and the test sound source 10 to form a pressure field environment between the sound pickup device 200 and the test sound source 10. The sound pickup device 200 generates a signal to be tested after receiving the sound signal. The detection structure 30 is used to detect the signal to be tested.

[0036] It should be noted that the sound pickup device 200 of the embodiment of the present application can be a microphone of a terminal device, specifically, a microphone of a mobile phone. Specifically, the mobile phone includes a top surface, a bottom surface and a side wall connecting the top surface and the surface, and the mobile phone microphone is arranged on the side wall. Of course, in other possible implementations, the sound pickup device 200 can also be a microphone of electronic products such as a watch, a tablet and a computer.

[0037] The detection structure 30 has the function of analyzing the signal to be tested generated after the sound pickup device 200 receives the sound signal. According to the preset data processing logic, the acoustic performance test results of the sound pickup device 200 can be obtained, such as acoustic performance parameters such as frequency response (FR), total harmonic distortion (THD), phase (Phase), sensitivity (Sensitivity), noise (Noise), etc. The detection structure 30 can be any available electronic device with computing capabilities, such as any type of audio analysis instrument and computer, etc.

[0038] It can be understood that the present application also includes a control system, and the test sound source 10, the detection structure 30 and the sound pickup device 200 are all communicatively connected to the control system, and the control system can control the test sound source 10, the detection structure 30 and the sound pickup device 200 to automatically coordinate and operate.

[0039] It should be noted that in the present application, by setting up the sealing structure 20, a pressure field environment is formed between the sound pickup device 200 and the test sound source 10, and the pressure field refers to the wavelength of the sound wave being larger than the place where the sound is located, that is, when the wavelength of the sound wave is larger than the size of the space where it is located, the sound pressure distribution in the space is relatively uniform, and there is no obvious standing wave or reflection effect. This environment is called a pressure field. For high-frequency sounds, such as 2000Hz sounds, the wavelength is about 1.715cm, so a pressure field is only formed in a closed space with a size of less than 1.715cm. In the pressure field, the sound pressure is evenly distributed, and there is almost no obvious standing wave or sound wave propagation direction. Usually, the extrusion contact can make the test sound source 10 and the sound pickup device 200 be in a small closed space, effectively simulating a uniform pressure environment.

[0040] Existing testing equipment usually tests the pickup device 200 in a free field environment. A free field refers to a situation where the wavelength of a sound wave is smaller than the location of the sound. That is, when the wavelength of a sound wave is smaller than the size of the space in which it is located, the propagation of the sound wave is not affected by the boundary and can propagate freely in the space. This environment is called a free field. For low-frequency sounds, such as 20Hz sounds, the wavelength is about 17.15m, so the free field length is at least 17.15m. To test in a free field environment, a soundproof box needs to be set up. The function of the soundproof box is to isolate external noise, provide a reflection-free free field environment, and ensure the accuracy of the test results.

[0041] The test equipment provided by the present application sets a sealing structure 20 between the test sound source 10 and the pickup device 200. The two ends of the sealing cavity 300 of the sealing structure 20 are respectively connected to the pickup device 200 and the test sound source 10, thereby forming a closed pressure field environment, which can effectively prevent the leakage of sound waves, concentrate the sound pressure around the pickup device 200, and ensure that the sound pressure in the test environment is uniform, so there is no need to set up a dedicated soundproof box, which can save costs. In addition, the present application can directly fit the sealing structure 20 and the pickup device 200 for testing, which is simple to operate and eliminates the steps of putting the pickup device 200 in and out of the soundproof box one by one, thereby simplifying the operation process, saving a lot of time, and effectively improving the test efficiency.

[0042] In addition, the volume, shape and internal design of the soundproof box used for free-field microphone testing impose many restrictions on the size and structure of the pickup device 200, while the sealing structure 20 of the present application can adapt to various forms of pickup devices 200, whether they are different models of mobile phones, tablets, or other small electronic devices, performance tests can be performed, thereby broadening the application scope of the test equipment, making it suitable for richer product forms, meeting the needs of diversified equipment testing, and improving the applicability of the test equipment.

[0043] In some embodiments, the sealing structure 20 includes a sealing block 21 having a first cavity 213 and a conductive tube 22 having a second cavity 221. The sealing block 21 is connected to the conductive tube 22 so that the first cavity 213 and the second cavity 221 are connected to form a sealed cavity 300. The sealing block 21 is in airtight contact with the pickup device 200, and the test sound source 10 is in airtight contact with the end of the conductive tube 22 facing away from the sealing block 21.

[0044] The conduction tube 22 is used to transmit the sound signal. The conduction tube 22 can significantly reduce the loss of the sound signal during the transmission process through its special structure and material, ensuring the stable transmission of the signal. It should be noted that the conduction tube 22 can be made of any existing material on the basis of ensuring that the sound conduction function can be achieved and no significant sound distortion is caused.

[0045] In addition, in the embodiment of the present application, the cross section of the conductive tube 22 is circular, that is, the second cavity 221 is a circular cavity, and the conductive tube 22 can be determined according to the sound frequency provided by the test sound source 10, and then the length and cross-sectional diameter of the conductive tube 22 can be determined. Of course, the cross section of the conductive tube 22 is not limited to a circle, and those skilled in the art can reasonably design the structure of the conductive tube 22 on the basis of ensuring the realization of its function.

[0046] Optionally, the sealing block 21 is made of an elastic material, so that the sealing block 21 has a buffering effect when in contact with the sound pickup device 200, does not damage the sound pickup device 200, and the sealing block 21 produces a slight deformation, thereby better adapting to the sound pickup device 200, so that the sealing block 21 and the sound pickup device 200 fit more closely. Optionally, the sealing block 21 can be made of rubber, silicone or sponge.

[0047] In some embodiments, the test sound source 10 includes a main body 12 and a sound outlet hole 11 arranged on the side of the main body 12 facing the pickup device 200, the sound outlet hole 11 is used to emit a sound signal, and the end of the conductive tube 22 facing away from the sealing block 21 is plugged into the sound outlet hole 11, so that the second cavity 221 is connected to the sound outlet hole 11, and the sound signal is emitted through the sound outlet hole 11, and the conductive tube 22 is plugged into the sound outlet hole 11, which can further ensure the sealing effect.

[0048] In some embodiments, the sealing block 21 includes a clamping portion 211 and an inserting portion 212 that are connected to each other. The clamping portion 211 is provided with a clamping notch on the end surface facing the pickup device 200. The pickup device 200 is clamped in the clamping notch, and the inserting portion 212 is plugged and fixed with the opening of the conductive tube 22. By plugging and fixing the plugging portion 212 with the opening of the conductive tube 22, the sealing block 21 and the conductive tube 22 can be tightly connected to ensure the airtightness of the sealed cavity 300. In addition, the pickup device 200 is clamped in the clamping notch, and the shape of the clamping notch can be adapted to the shape of the side wall of the pickup device 200, so that the sealing block 21 can be tightly fitted with the side wall of the pickup device 200, further ensuring the airtightness of the sealed cavity 300.

[0049] In some embodiments, the sound pickup device 200, the central axis of the first cavity 213, the central axis of the second cavity 221, and the sound outlet 11 are arranged at the same height. That is, the sound pickup device 200, the central axis of the sealing block 21, and the central axis of the conductive tube 22 are on the same horizontal line, which helps to improve the accuracy of the test results.

[0050] It should be noted that the sound pickup device 200 usually needs to be tested for air tightness, and the traditional air tightness test is usually performed in a free field environment. First, the sound pickup device 200 needs to be placed in a free field test environment without any blocking, and its frequency response curve is directly tested. This step measures the frequency response characteristics of the sound pickup device 200 in a normal open state; then, the sound pickup device 200 is blocked by pushing the plug through the cylinder of the airtight module. At this time, the sound inlet of the sound pickup device 200 is completely sealed, so as to test the frequency response curve in the sealed state; when the sound pickup device 200 is blocked, a second frequency response curve measurement is performed, and this frequency response curve reflects the characteristics of the sound pickup device 200 in the airtight state; finally, the difference calculation is performed, and the air tightness of the sound pickup device 200 is judged by comparing the difference between the two frequency response curves. If the difference is within the preset range, it means that the air tightness of the sound pickup device 200 is good; if the difference is large, there may be a leakage problem. Therefore, when conducting airtightness testing in a free field environment, it is necessary to measure the frequency response curve multiple times and calculate the difference to evaluate the airtightness, which is a cumbersome procedure.

[0051] In the present application, due to the provision of the sealing structure 20, a stable closed environment is formed, and the air tightness of the pickup device 200 in a pressure field environment can be more accurately verified. The pressure field environment enables the air tightness test and the normal test to be performed in the same environment without the need to switch the test scene or replace the equipment, thereby further improving the convenience and accuracy of the test.

[0052] In some embodiments, the sound pickup device 200 test device includes an audio generating component and a power amplifier. The audio generating component is used to generate a sound signal. The power amplifier is communicatively connected to the audio generating component and the test sound source. The power amplifier is used to amplify the sound signal generated by the audio generating component and transmit it to the test sound source, thereby ensuring that the power of the sound signal is sufficient to drive subsequent devices.

[0053] In some embodiments, the audio generation component may include a computer and a sound card. The computer is connected to the sound card via a USB. The sound card converts the digital test signal into an analog test signal and transmits it to a power amplifier for amplification. After the sound pickup device 200 receives the sound signal, it converts the received sound signal into an electrical signal and transmits it back to the detection structure 30 for analysis. Specifically, the sound pickup device 200 records the sound signal and transmits it back to the computer through the left and right channels of the earphone. The computer collects and analyzes the returned test signal to determine the sound quality of the sound pickup device 200.

[0054] In some embodiments, the test device for the pickup device 200 further includes a driving structure 60 disposed beside the pickup device 200, the test sound source 10 is disposed on the driving structure 60 and the sound outlet 11 faces the pickup device 200, the sealing structure 20 is detachably connected to the sound outlet 11, and the driving structure 60 is used to drive the test sound source 10 to move along a first direction so that the sealing structure 20 fits with the pickup device 200 or separates from the pickup device 200. The driving structure 60 can quickly drive the test sound source 10 and the sealing structure 20 as a whole to move toward or away from the pickup device 200, so that the sealing structure 20 quickly fits with or separates from the pickup device 200, thereby improving the convenience of operation and further improving the test efficiency. Optionally, the driving structure 60 is a linear electric cylinder.

[0055] In some embodiments, the test equipment for the pickup device 200 further includes a conveyor line 71 and a carrier 72 disposed on the conveyor line 71, the carrier 72 is used to fix the pickup device 200, the drive structure 60 is disposed beside the conveyor line 71, and the conveyor line 71 is used to convey the carrier 72 along the second direction so that the pickup device 200 moves to a preset position and docks with the drive structure 60. Multiple pickup devices 200 can be sequentially conveyed through the conveyor line 71, and the conveyor line 71 and the drive structure 60 are controlled by a control system to coordinate and cooperate, and the pickup devices 200 of the multiple pickup devices 200 are sequentially tested, and the entire process does not require manual assistance, further improving the test efficiency.

[0056] In addition, a contoured groove may be provided on the carrier 72 , and the sound pickup device 200 is disposed in the contoured groove. The shape of the contoured groove matches the outer contour of the sound pickup device 200 , so that the carrier 72 has a better positioning effect on the sound pickup device 200 .

[0057] In some embodiments, the conveyor line 71 has a lifting channel, and the lifting channel passes through the conveying surface of the conveyor line 71. The test equipment also includes a lifting structure 80 arranged in the lifting channel, and the lifting structure 80 is used to drive the carrier 72 to lift relative to the conveying surface, so that the pickup device 200 is separated from the conveying surface and moved to a preset height or falls on the conveying surface. The lifting structure 80 can move the pickup device 200 to a suitable height, so that the pickup device 200 can be accurately docked with the sealing structure 20 and the test sound source 10, thereby further improving the accuracy of the test.

[0058] Specifically, the conveying line 71 includes a first line body 711 and a second line body 712 that are spaced apart and arranged in parallel. The first line body 711 and the second line body 712 jointly support the carrier 72 , and a lifting channel is formed between the first line body 711 and the second line body 712 .

[0059] In some embodiments, the sound pickup device 200 test equipment also includes a resisting structure 90, which is disposed on the first wire body 711 or the second wire body 712. The resisting structure 90 is used to resist the carrier 72 after the carrier 72 moves to a preset position, thereby preventing the carrier 72 from moving excessively, making the sound pickup device 200 face the sealing structure 20 and the test sound source 10, and further improving the accuracy of the test.

[0060] In some embodiments, multiple conveyor lines 71 are arranged at intervals, and each conveyor line 71 is correspondingly provided with multiple test sound sources 10, so that multiple pickup devices 200 can be tested simultaneously. Compared with the traditional free-field test, which can only test a single pickup device 200 in series due to the limitation of the soundproof box, the present application can test multiple pickup devices 200 at the same time, which significantly improves the test efficiency and is suitable for batch test scenarios, especially large-scale test requirements in the production process.

[0061] See also Figure 7 This embodiment also provides a testing method, which is implemented by using the above-mentioned pickup device 200 testing device, and the testing method includes:

[0062] Step S101: Connect the sealing structure 20 between the sound pickup device 200 and the test sound source 10;

[0063] Step S102: the test sound source 10 emits a sound signal, and the sound signal is transmitted to the sound pickup device 200 after passing through the sealed cavity 300;

[0064] Step S103: the sound pickup device 200 converts the received sound signal into a signal to be tested and transmits it to the detection structure 30;

[0065] Step S104: the detection structure 30 detects the signal to be detected.

[0066] To summarize, the test equipment provided by the present application, by setting a sealing structure 20 between the test sound source 10 and the pickup device 200, the two ends of the sealing cavity 300 of the sealing structure 20 are respectively connected to the pickup device 200 and the test sound source 10, thereby forming a closed pressure field environment, which can effectively prevent the leakage of sound waves, and concentrate the sound pressure around the pickup device 200, thereby ensuring that the sound pressure in the test environment is uniform, so there is no need to set up a dedicated soundproof box, which can save costs. In addition, the present application can directly fit the sealing structure 20 and the pickup device 200 for testing, which is simple to operate and eliminates the steps of putting the pickup device 200 in and out of the soundproof box one by one, thereby simplifying the operation process, saving a lot of time, and effectively improving the test efficiency.

[0067] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A testing device for testing a sound pickup device (200), characterized in that: The test device comprises a test sound source (10) spaced apart from the sound pickup device (200), a sealing structure (20) connected between the sound pickup device (200) and the test sound source (10), and a detection structure (30) communicatively connected to the sound pickup device (200); the test sound source (10) is used to release a sound signal to the sound pickup device (200); the sealing structure (20) has a sealed cavity (300); two ends of the sealed cavity (300) are respectively connected to the sound pickup device (200) and the test sound source (10) to form a pressure field environment between the sound pickup device (200) and the test sound source (10); the sound pickup device (200) generates a signal to be tested after receiving the sound signal; and the detection structure (30) is used to detect the signal to be tested.

2. The test device according to claim 1, characterized in that: The sealing structure (20) comprises a sealing block (21) having a first cavity (213) and a conductive tube (22) having a second cavity (221); the sealing block (21) is connected to the conductive tube (22) so that the first cavity (213) and the second cavity (221) are connected to form the sealed cavity (300); the sealing block (21) is in airtight contact with the sound pickup device (200); and the test sound source (10) is in airtight contact with an end of the conductive tube (22) facing away from the sealing block (21).

3. The test device according to claim 2, characterized in that: The test sound source (10) comprises a main body (12) and a sound outlet hole (11) arranged on a side of the main body (12) facing the sound pickup device (200), the sound outlet hole (11) being used to emit the sound signal, and the end of the conductive tube (22) facing away from the sealing block (21) is plugged into the sound outlet hole (11), so that the second cavity (221) is connected to the sound outlet hole (11).

4. The test device according to claim 3, characterized in that: The sealing block (21) comprises a clamping portion (211) and an inserting portion (212) which are connected to each other; the clamping portion (211) is provided with a clamping notch on its end surface facing the sound pickup device (200); the sound pickup device (200) is clamped in the clamping notch; and the inserting portion (212) is inserted and fixed to the opening of the conducting tube (22).

5. The testing device according to any one of claims 1 to 4, characterized in that: The test equipment includes an audio generating component and a power amplifier. The audio generating component is used to generate the sound signal. The power amplifier is communicatively connected to the audio generating component and the test sound source. The power amplifier is used to amplify the power of the sound signal generated by the audio generating component and transmit it to the test sound source.

6. The testing device according to any one of claims 1 to 4, characterized in that: The microphone (210) test device further comprises a driving structure (60) arranged beside the sound pickup device (200); the test sound source (10) is arranged on the driving structure (60) and the test sound source (10) faces the sound pickup device (200); the sealing structure (20) is detachably connected to the test sound source (10); and the driving structure (60) is used to drive the test sound source (10) to move along a first direction so that the sealing structure (20) is attached to or separated from the sound pickup device (200).

7. The testing device according to claim 6, characterized in that: The testing device further comprises a conveyor line (71) and a carrier (72) arranged on the conveyor line (71), wherein the carrier (72) is used to fix the sound pickup device (200), the driving structure (60) is arranged beside the conveyor line (71), and the conveyor line (71) is used to transport the carrier (72) along a second direction so that the sound pickup device (200) moves to a preset position and docks with the driving structure (60).

8. The testing device according to claim 7, characterized in that: The conveyor line (71) has a lifting channel, and the lifting channel passes through the conveying surface of the conveyor line (71). The microphone (210) testing device also includes a lifting structure (80) arranged in the lifting channel, and the lifting structure (80) is used to drive the carrier (72) to rise and fall relative to the conveying surface, so that the sound pickup device (200) is separated from the conveying surface and moved to a preset height or falls on the conveying surface.

9. The testing device according to claim 8, characterized in that: A plurality of the conveying lines (71) are arranged at intervals, and each of the conveying lines (71) is correspondingly provided with a plurality of the test sound sources (10).

10. A testing method, implemented by the testing device according to any one of claims 1 to 9, characterized in that: include Connecting the sealing structure (20) between the sound pickup device (200) and the test sound source (10); The test sound source (10) emits a sound signal, and the sound signal is transmitted to the sound pickup device (200) after passing through the sealed cavity (300); The sound pickup device (200) converts the received sound signal into a signal to be tested and transmits the signal to the detection structure (30); The detection structure (30) detects the signal to be detected.

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