Earphone test fixture

Abstract

The utility model discloses an earphone test fixture. The earphone test fixture comprises a first support member, a second support member and a measurement microphone. The second supporting piece and the first supporting piece are oppositely arranged in a spaced mode, the second supporting piece is provided with a profiling groove and a sound outlet hole communicated with the profiling groove, the profiling groove is used for containing and bearing a to-be-tested earphone, and a first sound outlet hole of the to-be-tested earphone faces the sound outlet hole; and the measuring microphone is arranged on the first supporting piece, one end of the measuring microphone is provided with a sound receiving part, and the sound receiving part faces the sound outlet hole so as to receive sound emitted by the earphone to be tested for testing. According to the earphone test fixture, the measurement microphone and the earphone to be tested are respectively arranged on different support members, and vibration generated when the earphone to be tested is replaced each time mainly acts on the second support member, so that the first support member is not easy to influence, the risk of displacement of the measurement microphone can be reduced, and the test efficiency is improved. The consistency of the positions of the to-be-tested earphone and the measured microphone during each test is improved, and the accuracy and reliability of earphone test are improved.

Description

Technical Field

[0001] This utility model relates to the field of headphone testing technology, and in particular to a headphone testing fixture. Background Technology

[0002] Sound quality is a primary factor in evaluating headphone product quality. During headphone product development, test fixtures are typically designed to perform sound tests on the headphones to verify sound quality. In related technologies, headphone test fixtures mainly use measuring instruments to receive the sound emitted by the headphones under test. However, the commonly used test fixture structure is prone to issues during consistency testing or sample selection. Each time headphones are changed, the movement of removing and placing them can affect the position of the measuring instrument, potentially leading to inconsistencies between the position of the changed headphones and the measuring instrument and the previous measurement, resulting in inaccurate test results. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a headphone testing fixture that can improve the consistency of the positions of the headphone under test and the measuring microphone during each test, thereby improving the accuracy and reliability of headphone testing.

[0004] According to a first aspect embodiment of the present invention, the headphone testing fixture includes:

[0005] First support component;

[0006] A second support member is provided, opposite to and spaced apart from the first support member. The second support member has a contoured groove and a sound outlet communicating with the contoured groove. The contoured groove is used to accommodate and support the earphone under test, and the first sound outlet of the earphone under test faces the sound outlet.

[0007] A measuring microphone is disposed on the first support member. One end of the measuring microphone is provided with a sound receiving part, which faces the sound outlet to receive the sound emitted by the earphone under test for testing.

[0008] The headphone testing fixture according to the embodiments of this utility model has at least the following beneficial effects:

[0009] This invention relates to an earphone testing fixture. By incorporating a contoured groove in the second support member to accommodate the earphone under test, the groove is designed to conform to the earphone's outline. This groove restricts the earphone's placement, ensuring it is positioned correctly for testing. When performing consistency tests on multiple earphones, the contoured groove's positioning function ensures that each replacement earphone is in the same position. Furthermore, by placing the measuring microphone on the first support member, with the second support member spaced apart, the measuring microphone and earphone are located on separate supports. Vibrations generated during earphone replacement primarily affect the second support member, minimizing the risk of microphone displacement and ensuring the microphone remains in the same position as in the previous test. When using the headphone testing fixture of this utility model for headphone testing, the headphone under test is likely to be in the same position each time it is replaced, and the position of the measuring microphone is not easily affected each time the headphone under test is replaced. This improves the consistency of the position of the headphone under test and the measuring microphone during each test, thereby improving the accuracy and reliability of headphone testing.

[0010] According to some embodiments of the present invention, the earphone testing fixture further includes a base, the first support member is fixed to the base, and the second support member is detachably installed on the base.

[0011] According to some embodiments of the present invention, the base is provided with a slot, and the second support member includes a first end, which is inserted into the slot.

[0012] According to some embodiments of this utility model, the earphone testing fixture includes a limiting mechanism, and the second support member is limited to the base by the limiting mechanism; wherein...

[0013] The limiting mechanism includes a limiting post and a limiting hole. The limiting post is disposed on one of the first end and the base, and the limiting hole is disposed on the other of the first end and the base. The limiting post is inserted into the limiting hole.

[0014] And / or, the limiting mechanism includes a first magnetic element and a second magnetic element, the first magnetic element being disposed on the base and the second magnetic element being disposed on the first end, the first magnetic element and the second magnetic element being magnetically attracted to each other.

[0015] According to some embodiments of the present invention, the second support member includes a support body and a third magnetic member. The support body is provided with the contour groove and a mounting groove communicating with the contour groove. The third magnetic member is disposed in the mounting groove and is used to magnetically engage with the earphone under test so that the earphone under test is confined in the contour groove.

[0016] According to some embodiments of the present invention, the sound outlet includes a first hole and a second hole that are interconnected. The axes of the first hole and the second hole are coaxial. The second hole is located on the side of the first hole away from the contour groove. The diameter of the second hole increases along the direction from the second support member toward the first support member.

[0017] According to some embodiments of the present invention, the earphone under test includes a front cavity shell and a rear cavity shell connected to the front cavity shell, the front cavity shell is provided with a first sound outlet hole, and the rear cavity shell is provided with a second sound outlet hole;

[0018] The contoured groove includes a first groove that communicates with the sound outlet. At least a portion of the front cavity shell is used to accommodate the first groove. The second support member is also provided with a second groove that extends radially through the first groove along the sound outlet. The second sound outlet faces the second groove.

[0019] According to some embodiments of the present invention, the first support member is provided with a mounting hole, and the mounting hole is coaxial with the sound outlet hole;

[0020] The measuring microphone includes a rod, and the sound receiving part is disposed at one end of the rod near the second support member. The rod passes through the mounting hole and is interference-fitted with the mounting hole.

[0021] According to some embodiments of the present invention, the second support member includes a left earphone support member and a right earphone support member, and the left earphone support member and the right earphone support member are symmetrically arranged.

[0022] The number of the first support member and the measurement microphone is set to one. During a test cycle, one of the left earphone support member and the right earphone support member is positioned opposite to the first support member.

[0023] According to some embodiments of the present invention, both the first support member and the second support member are made of rigid materials.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 This is a first-view structural schematic diagram of the headphone testing fixture according to an embodiment of the present invention;

[0027] Figure 2This is a second-view structural schematic diagram of the headphone testing fixture according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the left and right earphone support members according to an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of the base structure according to an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of the base being assembled with the second support member via a limiting mechanism according to an embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the second support member according to an embodiment of the present utility model;

[0032] Figure 7 This is a cross-sectional view of the headphone testing fixture according to an embodiment of the present invention.

[0033] Figure label:

[0034] Headphone testing fixture 10;

[0035] Base 100; Slot 110;

[0036] First support component 200; mounting hole 210;

[0037] Second support member 300; left earphone support member 300a; right earphone support member 300b; support body 310; contour groove 311; first groove 3111; sound outlet 312; first hole 3121; second hole 3122; mounting groove 313; second groove 314; third magnetic member 320;

[0038] Measurement microphone 400; boom 410; receiver 411;

[0039] Limiting mechanism 500; limiting post 510; limiting hole 520; first magnetic component 530; second magnetic component 540. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0043] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0044] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Sound quality is a primary factor in evaluating headphone product quality. During headphone development, testing fixtures are typically designed to perform sound tests to verify sound quality. Currently, most headphone testing fixtures mount the headphones and measuring instruments on the same support, receiving the sound emitted by the headphones through the measuring instrument. However, during consistency testing or sample selection, vibrations from the removal and placement of the headphones can easily affect the measuring instrument, potentially causing inconsistencies in the positional relationship between the replaced headphones and the measuring instrument, leading to inaccurate test results.

[0046] To address the aforementioned problems, this application provides an earphone testing fixture. Please refer to... Figure 1 and Figure 2 The headphone test fixture 10 includes a first support 200, a second support 300, and a measuring microphone 400, which is a free-field microphone.

[0047] The second support member 300 is provided with a contoured groove 311 and a sound outlet 312 communicating with the contoured groove 311. The contoured groove 311 is used to accommodate and support the earphone under test, with the first sound outlet of the earphone facing the sound outlet 312. It can be understood that the contoured groove 311 is designed to conform to the contour shape of the earphone under test, so that the contour shape of the contoured groove 311 matches the earphone under test, and the contoured groove 311 plays a positioning role for the earphone under test. When the earphone under test is placed in the contoured groove 311, the first sound outlet communicates with the sound outlet 312, and the sound emitted by the earphone under test from its first sound outlet is transmitted outward through the sound outlet 312.

[0048] By setting a contour groove 311 in the second support 300, the contour groove 311 plays a positioning role. When the tester puts the earphone under test into the contour groove 311, the contour groove 311 restricts the placement posture of the earphone under test, so that the earphone under test can only be placed on the second support 300 in the posture required for testing. Therefore, when performing consistency tests on multiple earphones under test, due to the adaptability of the contour groove 311, it is easy to ensure that the earphone under test can be in the same position each time it is replaced.

[0049] The first support member 200 and the second support member 300 are positioned opposite each other and spaced apart. A measuring microphone 400 is disposed on the first support member 200. One end of the measuring microphone 400 is a receiving part 411, which faces the sound outlet 312 to receive the sound emitted by the earphone under test for testing. The receiving part 411 may include a sound outlet, through which the measuring microphone 400 receives the sound emitted by the earphone under test. It is easy to understand that when performing consistency testing on multiple earphones under test, only the earphones under test need to be replaced; there is no need to move the measuring microphone 400.

[0050] Since the first support 200 and the second support 300 are arranged at a relative interval, by setting the measuring microphone 400 on the first support 200 and the earphone under test on the second support 300, that is, setting the measuring microphone 400 and the earphone under test on different support members, the vibration generated each time the earphone under test is changed mainly acts on the second support 300 and is less likely to affect the first support 200. This can reduce the risk of displacement of the measuring microphone 400 and ensure that the measuring microphone 400 is in the same position as the previous test.

[0051] The headphone testing fixture 10 of this invention features a contoured groove 311 on the second support 300 to accommodate the headphone under test. The groove 311 is designed to conform to the contour of the headphone, restricting its placement and ensuring it is positioned correctly for testing. This allows for consistent testing of multiple headphones, as the groove 311 ensures each replacement headphone is in the same position. Furthermore, by placing the measuring microphone 400 on the first support 200, which is positioned opposite and spaced from the second support 300, the vibration generated during headphone replacement primarily affects the second support 300, minimizing the risk of microphone displacement and ensuring the microphone remains in the same position as in the previous test. Thus, when using the headphone testing fixture 10 of this utility model to perform headphone testing, the headphone under test is likely to be in the same position each time it is replaced, and the position of the measuring microphone 400 is not likely to be affected each time the headphone under test is replaced. This improves the consistency of the positions of the headphone under test and the measuring microphone 400 during each test, thereby improving the accuracy and reliability of headphone testing.

[0052] Some headphone testing fixtures in related technologies, such as human head-to-torso models (HATS), typically use soft silicone for the earlobes. During testing, the headphones are worn on these earlobes. Because soft silicone earlobes are easily deformed, the position of the headphones changes frequently after each test. To address this, in one embodiment, the second support member 300 is made of a rigid material. This provides sufficient rigidity to prevent easy deformation under external forces. The removal and placement of the headphones will not deform the contour groove 311, thus improving the consistency of the headphone's position each time it is replaced, and further enhancing the accuracy and reliability of the test results. For example, the second support member 300 can be made of Teflon.

[0053] Similarly, to ensure that the position of the measuring microphone 400 does not easily change, in one embodiment, the first support member 200 can also be made of a rigid material. For example, the first support member 200 can be made of aluminum.

[0054] Continue to refer to Figure 1 As shown, the headphone test fixture 10 also includes a base 100, which supports the first support member 200 and the second support member 300 to facilitate headphone testing. In some embodiments, the second support member 300 is detachably mounted on the base 100.

[0055] During the headphone development phase, multiple headphone models are often designed and tested simultaneously to verify feasibility. For different models / specifications of the headphone under test, a matching second support component 300 needs to be configured for each. In this embodiment, by detachably connecting the second support component 300 to the base 100, only the second support component 300 needs to be replaced when testing different headphone models under test, while the first support component 200 and the measurement microphone 400 remain unchanged. Therefore, the headphone test fixture 10 can test different models / specifications of headphone under test without the need to set up a dedicated headphone test fixture 10 for each headphone under test, which can reduce R&D costs.

[0056] It should also be noted that the earphone under test generally includes two earphones, left and right. Correspondingly, two second support members 300 are configured for the left and right earphones. By detachably connecting the second support member 300 to the base 100, only one first support member 200 and one measurement microphone 400 are needed when testing the earphone. The left and right earphones can be tested separately and sequentially using a single measurement microphone 400. For example, when testing the left earphone, the corresponding second support member 300 is installed on the base 100. After testing the left earphone, when testing the right earphone, the corresponding second support member 300 is installed on the base 100. Thus, by replacing the second support member 300 to test the left and right earphones, one set of first support members 200 and measurement microphone 400 can be reduced, simplifying the overall structure of the earphone testing fixture 10, reducing its configuration cost, and further lowering R&D costs.

[0057] Exemplary, in one embodiment, reference Figure 3 As shown, the second support 300 includes a left earphone support 300a and a right earphone support 300b. The left earphone support 300a and the right earphone support 300b are symmetrically arranged. During testing, the left earphone is placed on the left earphone support 300a, and the right earphone is placed on the right earphone support 300b. The number of the first support 200 and the measuring microphone 400 is set to one. During one test cycle, one of the left earphone support 300a and the right earphone support 300b is positioned opposite to the first support 200.

[0058] In one embodiment, please refer to Figure 1 And refer to Figure 4 The base 100 is provided with a slot 110, and the second support 300 includes a first end, which is inserted into the slot 110. The two are connected by a plug-in method, which allows for quick and convenient replacement of the second support 300 according to testing needs.

[0059] The headphone test fixture 10 may also include a limiting mechanism 500 for limiting the second support member 300. In some embodiments, please refer to... Figure 5 The limiting mechanism 500 includes a limiting post 510 and a limiting hole 520. The limiting post 510 is disposed on one of the first end and the base 100, and the limiting hole 520 is disposed on the other of the first end and the base 100. The limiting post 510 is inserted into the limiting hole 520.

[0060] like Figure 5 As shown in the accompanying drawings of this embodiment, the limiting post 510 is disposed on the base 100 and the limiting hole 520 is disposed on the first end of the second support member 300 as an example, which should not be regarded as a limitation of this application. The limiting post 510 is at least partially located within the slot 110 of the base 100, and the axial direction of the limiting post 510 can extend along the insertion direction of the second support member 300 (i.e., the depth direction of the slot 110), so that the first end of the second support member 300 can be inserted into the slot 110. The limiting post 510 can be integrally formed with the base 100 or connected to the base 100. Through the limiting cooperation of the limiting post 510 and the limiting hole 520, the radial movement of the second support member 300 along the limiting post 510 is restricted, allowing the second support member 300 to be securely inserted into the base 100 and preventing the second support member 300 from shaking or tipping over.

[0061] In other embodiments, please continue to refer to Figure 5 The limiting mechanism 500 includes a first magnetic element 530 and a second magnetic element 540. The first magnetic element 530 is disposed on the base 100, and the second magnetic element 540 is disposed on the first end. The first magnetic element 530 and the second magnetic element 540 are magnetically attracted to each other. By respectively setting the first magnetic element 530 and the second magnetic element 540 on the base 100 and the second support member 300, the two are attracted together under the action of magnetic force. This also allows the second support member 300 to be firmly inserted into the base 100, preventing the second support member 300 from shaking or tipping over.

[0062] Therefore, by setting the limiting mechanism 500 to limit the second support member 300, the stability of the second support member 300 and the base 100 is enhanced. This ensures that the second support member 300 is firmly inserted into the base 100, preventing the second support member 300 from tipping over due to the change in the overall center of gravity after the earphone under test is installed. At the same time, it prevents the second support member 300 from shaking due to vibration during the test, which would affect the accuracy of the test results.

[0063] In some embodiments, please refer to Figure 6The second support member 300 includes a support body 310 and a third magnetic member 320. The support body 310 is provided with the aforementioned contoured groove 311 and a mounting groove 313 communicating with the contoured groove 311. The third magnetic member 320 is disposed in the mounting groove 313 and is used to magnetically engage with the earphone under test, so that the earphone under test is confined in the contoured groove 311. It is easy to understand that the earphone under test generally has a pre-installed magnetic component. When the tester places the earphone under test into the contoured groove 311, the contoured surface of the contoured groove 311 supports and confines the earphone under test. At the same time, through the magnetic engagement between the third magnetic member 320 and the magnetic component inside the earphone under test, the earphone under test can be stably contained in the contoured groove 311 during the test, preventing the earphone under test from falling off the second support member 300 and ensuring the smooth progress of the earphone test. To enhance the magnetic attraction between the two, the mounting groove 313 is positioned in the contour groove 311 in a manner that corresponds to the position of the magnetic component on the earphone under test.

[0064] This embodiment utilizes the magnetic attraction inherent in the earphone under test to configure the second support 300 as described above. This allows the earphone to be securely placed on the second support 300 under magnetic attraction, eliminating the need for manual support during testing and facilitating the process. It also makes it easy to remove and place the earphone when needing to be replaced. Furthermore, using magnetic attraction to hold the earphone on the second support 300, compared to using other clamping or pressing mechanisms, results in a simpler and more reliable overall structure for the earphone testing fixture 10. This allows researchers to obtain reliable test results with a simple testing fixture, accelerating earphone development and reducing costs.

[0065] In some embodiments, please refer to Figure 7 The sound outlet 312 includes a first hole 3121 and a second hole 3122 that are interconnected. The axes of the first hole 3121 and the second hole 3122 are coaxial. The second hole 3122 is located on the side of the first hole 3121 away from the contour groove 311. The second hole 3122 is the hole section of the sound outlet 312 that is close to the measuring microphone 400. The diameter of the second hole 3122 increases along the direction from the second support member 300 toward the first support member 200.

[0066] By making the diameter of the second hole 3122 increase gradually along the direction from the second support 300 toward the first support 200, in other words, by making the diameter of the second hole 3122 increase from the end of the second hole 3122 closer to the first hole 3121 to the end farther away from the first hole 3121, the second hole 3122 is designed to be an flared opening toward the measurement microphone 400. When the sound emitted by the earphone under test propagates through the sound outlet 312 toward the measurement microphone 400, sound reflection can be avoided from affecting the test, which is beneficial to the accuracy of the sound test. Specifically, to achieve the above setting, the side of the sound outlet 312 closer to the measurement microphone 400 can be chamfered, and the hole wall of the second hole 3122 can be designed as a slope or an arc surface. The accompanying drawings of this embodiment only illustrate a slope as an example and should not be regarded as a limitation of this application.

[0067] It should also be noted that if one end of the measuring microphone 400 is inserted into the second hole 3122 during testing, the above-mentioned arrangement makes the internal space of the second hole 3122 larger, resulting in a larger gap between one end of the measuring microphone 400 and the inner wall of the second hole 3122, providing more clearance. This facilitates the insertion or removal of the second support member 300, effectively preventing interference and displacement between the second support member 300 and the measuring microphone 400 during insertion or removal, and preventing changes in the position of the measuring microphone 400. This ensures better consistency in the position of the measuring microphone 400 during each test, avoiding any impact on the accuracy and reliability of the test results.

[0068] The earphone under test includes a front cavity shell and a rear cavity shell connected to the front cavity shell. The front cavity shell has the aforementioned first sound outlet, which is located on the end face of the front cavity shell facing the human ear canal. The sound emitted by the earphone under test is mainly received by the human body through the first sound outlet. The rear cavity shell has a second sound outlet, which is located on the side of the rear cavity shell.

[0069] In one embodiment, please refer to Figure 6 The contoured groove 311 includes a first groove 3111, which communicates with the sound outlet 312. At least a portion of the front cavity shell is used to accommodate the first groove 3111. The second support member 300 is also provided with a second groove 314, which penetrates the first groove 3111 radially along the sound outlet 312, so that the second groove 314 communicates with the first groove 3111. The second sound outlet faces the second groove 314.

[0070] Furthermore, by setting a second slot 314, when the earphone under test is placed in the contour slot 311, the position of the second slot 314 corresponds to the position of the second sound hole, so that the second sound hole is connected to the second slot 314. The supporting body 310 will not block the second sound hole, avoiding resonance and affecting the test, which can further improve the accuracy and reliability of the test results.

[0071] Since the headphone test fixture 10 uses the same measuring microphone 400 to test different headphones under test, the first support 200 does not need to be replaced. Therefore, the first support 200 can be kept relatively fixed with the base 100. The first support 200 can be integrally formed with the base 100, or the first support 200 can be fixedly connected with the base 100.

[0072] In one embodiment, the first support member 200 is provided with a mounting hole 210, which is coaxial with the sound outlet 312. The measuring microphone 400 includes a rod 410, and a receiving part 411 is disposed at one end of the rod 410 near the second support member 300. The rod 410 passes through the mounting hole 210, which allows the measuring microphone 400 to be easily and quickly fixed on the first support member 200, and facilitates the tester to adjust the distance between the measuring microphone 400 and the sound outlet of the earphone under test. The rod 410 and the mounting hole 210 are interference-fitted, ensuring that the measuring microphone 400 is stably fixed on the first support member 200, preventing the measuring microphone 400 from shifting due to vibration, and further ensuring the consistency of the measuring microphone 400's position in each test.

[0073] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. An earphone testing fixture, characterized in that, include: First support component; The second support member is provided opposite to and spaced apart from the first support member. The second support member is provided with a contoured groove and a sound outlet communicating with the contoured groove. The contoured groove is used to accommodate and support the earphone under test. The first sound outlet of the earphone under test faces the sound outlet. and A measuring microphone is disposed on the first support member. One end of the measuring microphone is provided with a sound receiving part, which faces the sound outlet to receive the sound emitted by the earphone under test for testing.

2. The headphone testing fixture according to claim 1, characterized in that, The headphone testing fixture also includes a base, the first support member is fixed to the base, and the second support member is detachably installed on the base.

3. The headphone testing fixture according to claim 2, characterized in that, The base is provided with a slot, and the second support member includes a first end, which is inserted into the slot.

4. The headphone testing fixture according to claim 3, characterized in that, The headphone testing fixture includes a limiting mechanism, and the second support member is limited to the base by the limiting mechanism; wherein... The limiting mechanism includes a limiting post and a limiting hole. The limiting post is disposed on one of the first end and the base, and the limiting hole is disposed on the other of the first end and the base. The limiting post is inserted into the limiting hole. And / or, the limiting mechanism includes a first magnetic element and a second magnetic element, the first magnetic element being disposed on the base and the second magnetic element being disposed on the first end, the first magnetic element and the second magnetic element being magnetically attracted to each other.

5. The headphone testing fixture according to any one of claims 1 to 4, characterized in that, The second support member includes a support body and a third magnetic component. The support body is provided with the contour groove and a mounting groove communicating with the contour groove. The third magnetic component is disposed in the mounting groove and is used to magnetically engage with the earphone under test so that the earphone under test is confined in the contour groove.

6. The headphone testing fixture according to any one of claims 1 to 4, characterized in that, The sound outlet includes a first hole and a second hole that are interconnected. The axes of the first hole and the second hole are coaxial. The second hole is located on the side of the first hole away from the contour groove. The diameter of the second hole increases along the direction from the second support member toward the first support member.

7. The headphone testing fixture according to any one of claims 1 to 4, characterized in that, The earphone under test includes a front cavity shell and a rear cavity shell connected to the front cavity shell. The front cavity shell is provided with a first sound outlet hole, and the rear cavity shell is provided with a second sound outlet hole. The contoured groove includes a first groove that communicates with the sound outlet. At least a portion of the front cavity shell is used to accommodate the first groove. The second support member is also provided with a second groove that extends radially through the first groove along the sound outlet. The second sound outlet faces the second groove.

8. The headphone testing fixture according to any one of claims 1 to 4, characterized in that, The first support member is provided with a mounting hole, which is coaxial with the sound outlet hole; The measuring microphone includes a pole, and the sound receiving part is disposed at one end of the pole near the second support member. The pole passes through the mounting hole and is interference-fitted with the mounting hole.

9. The headphone testing fixture according to any one of claims 1 to 4, characterized in that, The second support member includes a left earphone support member and a right earphone support member, and the left earphone support member and the right earphone support member are symmetrically arranged. The number of the first support member and the measurement microphone is set to one. During a test cycle, one of the left earphone support member and the right earphone support member is positioned opposite to the first support member.

10. The headphone testing fixture according to any one of claims 1 to 4, characterized in that, Both the first support member and the second support member are made of rigid materials.

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