Acoustic performance testing device and system

Abstract

This utility model relates to the field of acoustic testing device technology, providing an acoustic performance testing device and system. The acoustic performance testing device includes: an upper shell, a lower shell, and a flexible base. The upper and lower shells are interlocked, and the lower shell has an accommodating space. The flexible base includes a first plane and a recessed portion lower than the first plane. The first plane surrounds the periphery of the recessed portion. The flexible base is installed inside the lower shell, with at least a portion of the first plane located within the accommodating space. The inner bottom of the recessed portion has a mounting hole communicating with the outside, suitable for mounting an amplifier. This ensures both sealed contact between the sound output part of the electronic device under test and the flexible base, and stable placement of the electronic device, thereby maintaining the stability and accuracy of the testing process, ensuring high consistency of passive curve test results, effectively reducing the frequency of false tests and retests, and keeping the test data stable.

Description

Technical Field

[0001] This utility model relates to the field of acoustic testing device technology, and in particular to an acoustic performance testing device and system. Background Technology

[0002] After a hearing aid is assembled, it undergoes overall acoustic performance testing to verify its acoustic output characteristics. This testing involves adjusting the hearing aid's output volume and conducting multi-parameter tests to ensure the product meets design specifications. However, the simulated ear, a core testing device, has a rigid metal tube that makes it difficult to create an airtight seal between its opening and the hearing aid's sound-emitting components. During acoustic testing, sound waves can easily leak from the contact gaps, leading to two major problems: first, the low-frequency acoustic response becomes distorted due to insufficient sealing, failing to accurately reflect the hearing aid's true frequency response characteristics; second, the assessment of protection performance indicators such as noise isolation is biased, affecting the reliability of verifying the product's environmental adaptability. These sealing defects directly limit the accuracy of test data, becoming a core technical bottleneck restricting the objective evaluation of hearing aid acoustic performance. Utility Model Content

[0003] This invention provides an acoustic performance testing device and system, aiming to solve the problem of acoustic performance data distortion caused by insufficient sealing of testing equipment in the prior art.

[0004] In a first aspect, this utility model provides an acoustic performance testing device, comprising: An upper shell and a lower shell that interlock with each other, wherein the lower shell is provided with an accommodating space; A flexible seat includes a first plane and a recessed portion lower than the first plane, the first plane being disposed around the periphery of the recessed portion; wherein, the flexible seat is installed inside the lower shell, the first plane being at least partially located within the accommodating space, and the inner bottom of the recessed portion is provided with a mounting hole communicating with the outside, the mounting hole being suitable for mounting an amplifier.

[0005] According to the acoustic performance testing device provided by this utility model, the lower shell includes a base and a connecting seat. The connecting seat is provided with the accommodating space and the installation space communicating with the accommodating space. The flexible seat is located in the installation space and is sandwiched between the base and the connecting seat.

[0006] According to the acoustic performance testing device provided by this utility model, the base and the connecting seat are detachably connected.

[0007] According to the acoustic performance testing device provided by this utility model, the flexible seat further includes a second plane lower than the first plane, and the concave portion and the second plane are respectively located on both sides of the first plane; The acoustic performance testing device also includes an auxiliary support component, which includes a top plate and a side plate connected together. The top plate is sandwiched between the second plane and the top wall of the installation space, and the side plate is sandwiched between the outer side of the flexible seat and the side wall of the installation space.

[0008] According to the acoustic performance testing device provided by this utility model, the side plate is threadedly connected to the side wall of the installation space.

[0009] According to the acoustic performance testing device provided by this utility model, the base is provided with a through hole corresponding to the recessed portion, and the mounting hole communicates with the outside through the through hole.

[0010] According to the acoustic performance testing device provided by this utility model, the flexible seat further includes a protrusion protruding from the bottom surface of the flexible seat, the protrusion being disposed corresponding to the recess, the mounting hole being a stepped hole, and at least a small-diameter end of the mounting hole being disposed on the protrusion; wherein, the protrusion passes through the through hole.

[0011] According to the acoustic performance testing device provided by this utility model, the through hole is a stepped hole, the protrusion is inserted into the small diameter end of the through hole, and the large diameter end of the through hole is adapted to be threadedly connected to the acoustic performance testing receiving device.

[0012] According to the acoustic performance testing device provided by this utility model, the upper shell and the lower shell are rotatably connected, the upper shell is rotatably connected with a hook, and the lower shell is equipped with a buckle that is adapted to engage with the hook. The upper shell and the lower shell define a cavity for receiving, the cavity being in communication with the accommodating space, and the cavity being adapted to fix the electronic device under test.

[0013] Secondly, this utility model provides an acoustic performance testing system, including: an amplifier, an acoustic performance testing receiver, and the aforementioned acoustic performance testing device; The amplifier is mounted in the mounting hole and is electrically connected to the acoustic performance test receiver.

[0014] The acoustic performance testing device and system provided by this utility model clamps the outer shell of the electronic device under test between the upper and lower shells to fix the position of the electronic device under test. At this time, the sound-emitting part of the electronic device under test extends into the receiving space of the lower shell and tightly abuts against the first plane of the flexible base, ensuring that the sound is completely transmitted to the amplifier installed in the recessed part. The amplifier amplifies the received acoustic signal and transmits it to the acoustic performance testing receiving device for accurate evaluation of acoustic performance. In this way, it can ensure that the sound-emitting part of the electronic device under test is in sealed contact with the flexible base, and also ensure that the electronic device under test is placed stably, thereby maintaining the stability and accuracy of the testing process, ensuring high consistency of passive curve test results, effectively reducing the frequency of false tests and retests, and keeping the test data stable. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is one of the structural schematic diagrams of the acoustic performance testing device provided by this utility model.

[0017] Figure 2 This is a cross-sectional view of the acoustic performance testing device provided by this utility model.

[0018] Figure 3 This is the second structural schematic diagram of the acoustic performance testing device provided by this utility model.

[0019] Figure 4 This is one of the structural schematic diagrams of the flexible seat provided by this utility model.

[0020] Figure 5 This is the second structural schematic diagram of the flexible seat provided by this utility model.

[0021] Figure 6 This is a structural schematic diagram of the auxiliary support component provided by this utility model.

[0022] Figure label: 1. Upper shell; 11. Hook; 2. Lower shell; 21. Connecting seat; 211. Accommodating space; 212. Receiving cavity; 213. Fastener; 22. Base; 221. Through hole; 3. Flexible seat; 31. First plane; 32. Recessed part; 321. Mounting hole; 33. Second plane; 34. Protrusion; 4. Auxiliary support; 41. Top plate; 42. Side plate; 5. Amplifier. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] It should be noted that the acoustic performance testing device of this utility model embodiment can be used for acoustic performance testing of electronic devices such as hearing aids and in-ear headphones. The following description takes hearing aids as an example.

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, the acoustic performance testing device of this utility model embodiment includes: an upper shell 1, a lower shell 2, and a flexible base 3. The upper shell 1 and the lower shell 2 are interlocked, and the lower shell 2 is provided with an accommodating space 211. For example, the accommodating space 211 is recessed on the surface of the lower shell 2, and the accommodating space 211 includes a flared portion and a guide portion.

[0026] Furthermore, the flexible base 3 includes a first plane 31 and a recess 32 lower than the first plane 31, with the first plane 31 surrounding the periphery of the recess 32. The flexible base 3 is installed within the lower housing 2, and the first plane 31 is at least partially located within the accommodating space 211. For example, a portion of the first plane 31 may be located within the guide portion of the accommodating space 211, or the entire first plane 31 may be located within the guide portion of the accommodating space 211. Compared to a partial location of the first plane 31 within the accommodating space 211, a location where the entire first plane 31 is located within the accommodating space 211 increases the contact area between the electronic device under test (DUT) and the first plane 31, further improving the placement stability of the DUT. In other words, when a portion of the first plane 31 is located within the accommodating space 211, another portion of the first plane 31 is obscured by the lower housing 2; when the entire first plane 31 is located within the accommodating space 211, the entire flexible base 3 can be located within the accommodating space 211. In addition, the inner bottom of the recessed portion 32 is provided with a mounting hole 321 that communicates with the outside, and the mounting hole 321 is suitable for mounting the amplifier 5. The flexible base 3 can be made of silicone material.

[0027] It is particularly important to note that the first plane 31 is at least partially located within the accommodating space 211, meaning that when the electronic device under test (DUT) is inserted into the accommodating space 211, its sound-emitting part can contact the first plane 31. This improves the placement stability of the DUT and ensures the stability and accuracy of the testing process. Simultaneously, due to the flexible nature of the first plane 31, the sound-emitting part of the DUT can maintain close contact with it at all times, ensuring test sealing and allowing all the sound emitted by the DUT to be transmitted to the amplifier 5 installed in the recess 32. This design is suitable for different types of DUTs.

[0028] In other words, because the flexible seat 3 has a certain degree of flexibility, the acoustic performance testing device of this utility model embodiment is suitable for acoustic performance testing of various amplifiers 5 of different sizes and electronic devices under test. For example, to test different models of amplifiers 5, it is only necessary to pull the amplifier 5 out of the mounting hole 321 from the recess 32 and insert another amplifier 5, which can significantly improve the testing efficiency.

[0029] In practical applications, the outer casing of the electronic device under test (DUT) is sandwiched between the upper casing 1 and the lower casing 2 to fix its position. At this time, the sound-emitting part of the DUT extends into the accommodating space 211 of the lower casing 2, tightly abutting against the first plane 31 of the flexible base 3, ensuring complete sound transmission to the amplifier 5 installed in the recess 32. The amplifier 5 amplifies the received acoustic signal and transmits it to the acoustic performance testing receiver for accurate acoustic performance evaluation. This ensures both a sealed contact between the sound-emitting part of the DUT and the flexible base 3, and a stable placement of the DUT, thereby maintaining the stability and accuracy of the testing process, ensuring high consistency of passive curve test results, effectively reducing the frequency of false tests and retests, and keeping the test data stable.

[0030] In optional embodiments, such as Figure 1 and Figure 2 As shown, the lower shell 2 includes a base 22 and a connecting seat 21. The connecting seat 21 is provided with a receiving space 211 and an installation space communicating with the receiving space 211. The flexible seat 3 is located in the installation space and is sandwiched between the base 22 and the connecting seat 21.

[0031] It should be noted that the accommodating space 211 provides a placement space for the sound output part of the electronic device under test (such as a hearing aid). Its shape and size can be set according to the shape requirements of the sound output part to ensure that the sound output part can be smoothly inserted and tightly abut against the first plane 31 of the flexible base 3 and maintain a relatively stable position. In addition, the mounting space communicates with the accommodating space 211, and its function is to accommodate the flexible base 3. The size and shape of the mounting space match the flexible base 3 so that the flexible base 3 can be accurately installed within it. The diameter of the mounting space is larger than the diameter of the accommodating space 211.

[0032] In practical applications, the flexible seat 3 can be firmly fixed in the installation space by the clamping action of the base 22 and the connecting seat 21, preventing loosening or displacement during testing and thus ensuring the stability of the testing environment. After being clamped, the flexible seat 3 forms a good seal with the base 22 and the connecting seat 21, reducing the impact of external interference on the test results. Especially when acoustic performance testing is involved, good sealing helps to improve the accuracy of the test.

[0033] In optional embodiments, such as Figure 1 and Figure 2 As shown, the base 22 and the connecting seat 21 are detachably connected. It should be noted that the base 22 and the connecting seat 21 can be connected in several ways. Two common methods are illustrated below: First, screw holes are provided at corresponding positions on the base 22 and the connecting seat 21, and the two are fixed together with screws. This connection method is simple in structure, reliable in connection, and easy to disassemble. For example, four screws can be passed through the screw holes on the base 22 and the connecting seat 21 respectively, and the connection can be completed by tightening the screws with a wrench; when disassembly is needed, simply loosen the screws in the opposite direction with a wrench. Second, a snap-fit ​​structure is designed on the edges of the base 22 and the connecting seat 21, achieving a detachable connection through the engagement and disengagement of the snap-fit. Snap-fit ​​connections are convenient and quick to operate, requiring no additional tools. For example, a protruding snap-fit ​​is provided on the base 22, and a corresponding slot is provided on the connecting seat 21. During installation, the snap-fit ​​is simply inserted into the slot; during disassembly, the snap-fit ​​is pressed firmly to disengage it from the slot.

[0034] In optional embodiments, such as Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the flexible seat 3 also includes a second plane 33 lower than the first plane 31, with the recess 32 and the second plane 33 located on opposite sides of the first plane 31. The acoustic performance testing device also includes an auxiliary support 4, which comprises a top plate 41 and a side plate 42 connected together. The top plate 41 is sandwiched between the second plane 33 and the top wall of the mounting space, and the side plate 42 is sandwiched between the outer side of the flexible seat 3 and the side wall of the mounting space. The thickness of the top plate 41 is the same as the height difference between the first plane 31 and the second plane 33.

[0035] It should be noted that the auxiliary support 4 is a ring-shaped structure with an "L"-shaped cross-section. The top plate 41 is sandwiched between the second plane 33 of the flexible seat 3 and the top wall of the installation space, serving to support and fix the flexible seat 3, preventing vertical displacement during testing. The side plate 42 is sandwiched between the outer side of the flexible seat 3 and the side wall of the installation space, providing lateral support and positioning for the flexible seat 3, preventing horizontal swaying and ensuring the stability of the flexible seat 3 during installation. In other words, the auxiliary support 4 provides stable support and positioning for the flexible seat 3, ensuring its fixed position.

[0036] In practical applications, the side plate 42 is threadedly connected to the side wall of the mounting space. For example, the side wall of the mounting space is provided with a first thread, and the side plate 42 facing away from the flexible seat 3 is provided with a second thread that matches the first thread. The threaded connection has high connection strength and self-locking properties, and can withstand large external forces and vibrations, ensuring the connection stability between the auxiliary support 4 and the side wall of the mounting space.

[0037] In optional embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the base 22 has a through hole 221 at the location corresponding to the recess 32, and the mounting hole 321 communicates with the outside through the through hole 221.

[0038] It should be noted that a through hole 221 is provided on the base 22 at a position corresponding to the recess 32 of the flexible seat 3. For example, the through hole 221 is circular, and its center is on the same vertical line as the center of the recess 32 of the flexible seat 3. The mounting hole 321 communicates with the outside world through the through hole 221, allowing external devices or cables to be connected to the amplifier 5 within the mounting hole 321 via the through hole 221.

[0039] In optional embodiments, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the flexible seat 3 also includes a protrusion 34 protruding from the bottom surface of the flexible seat 3. The protrusion 34 is provided corresponding to the recess 32. The mounting hole 321 is a stepped hole. At least a small diameter end of the mounting hole 321 is provided on the protrusion 34. The protrusion 34 passes through the through hole 221.

[0040] It should be noted that the mounting hole 321 is a stepped hole. For example, its major diameter end has a diameter of 15mm and a depth of 8mm; its minor diameter end has a diameter of 8mm and a depth of 6mm, and the minor diameter end is located at the corresponding position of the protrusion 34 of the flexible seat 3. The major diameter end of the mounting hole 321 can serve to position and accommodate part of the amplifier 5.

[0041] Understandably, the fit between the protrusion 34 and the through hole 221 allows the flexible seat 3 to be precisely positioned during installation, reducing installation errors. Meanwhile, the stepped hole 321, with a portion of its smaller diameter end located on the protrusion 34, facilitates the connection of external equipment or cables to the amplifier 5 within the mounting hole 321, improving the accuracy and stability of the connection.

[0042] In optional embodiments, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the via 221 is a stepped hole, and the protrusion 34 is inserted into the small diameter end of the via 221. The large diameter end of the via 221 is suitable for threaded connection with the acoustic performance test receiver.

[0043] It should be noted that the fit between the protrusion 34 and the small-diameter end of the through hole 221 enables the flexible seat 3 to be precisely positioned during installation, reducing installation errors. Simultaneously, the threaded connection between the large-diameter end of the through hole 221 and the acoustic performance testing receiver provides reliable connection strength, ensuring that the acoustic performance testing receiver will not loosen during testing and guaranteeing the accuracy of the test data.

[0044] In optional embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the upper shell 1 and the lower shell 2 are rotatably connected. The upper shell 1 is rotatably connected with a hook 11, and the lower shell 2 is fitted with a fastener 213 that is adapted to engage with the hook 11. A cavity 212 is defined between the upper shell 1 and the lower shell 2, which communicates with the accommodating space 211. The cavity 212 is suitable for fixing the electronic device under test (DUT). In other words, the cavity 212 is formed by the upper shell 1 and the lower shell 2 when closed, and communicates with the accommodating space 211. The shape and size of the cavity 212 are set according to the size of the DUT to ensure that it can completely accommodate and fix the DUT. In other words, most of the outer shell of the DUT can be fixed inside the cavity 212, while the sound output part of the DUT extends into the accommodating space 211, ensuring that the sound output part of the DUT is in close contact with the first plane 31 of the flexible base 3.

[0045] It should be noted that on one side edge of the upper shell 1, a pivot is used to achieve a rotatable connection with the connecting seat 21, allowing the upper shell 1 to open and close flexibly. The hook 11 can be an L-shaped metal part, including a hook portion and a connecting portion. The front end of the hook portion has an inclined guide surface, which can guide the hook portion to smoothly engage with the fastener 213, reducing the difficulty of operation; the connecting portion is rotatably connected to the other side edge of the upper shell 1 via a pivot, allowing the hook 11 to rotate relative to the upper shell 1, facilitating its engagement with the fastener 213. Correspondingly, the fastener 213 has a groove that matches the hook portion of the hook 11. When the upper shell 1 is closed, the hook portion can accurately engage in the groove for fixation. The fastener 213 can be fixed to the outer wall of the connecting seat 21 with screws to ensure its stable installation, thereby ensuring the reliability of engagement with the hook 11. Understandably, the upper shell 1 and the lower shell 2 are connected by rotation and the hook 11 and the buckle 213 are matched and engaged to achieve quick opening and closing, which facilitates the placement and removal of the electronic device under test and improves the testing efficiency.

[0046] Furthermore, this embodiment of the invention also provides an acoustic performance testing system, including: an amplifier 5, an acoustic performance testing receiver, and an acoustic performance testing device; the amplifier 5 is mounted in a mounting hole 321, and the amplifier 5 is electrically connected to the acoustic performance testing receiver. The acoustic performance testing receiver can be housed in the large-diameter end of the through hole 221. In practical applications, the acoustic performance testing system of this embodiment can be used for acoustic performance testing of the amplifier 5 or for overall hearing aid testing.

[0047] Specifically, since the acoustic performance testing system includes the acoustic performance testing device as described above, and the specific structure of the acoustic performance testing device refers to the above embodiments, the acoustic performance testing system shown in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects achieved by all the above technical solutions, which will not be described in detail here.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An acoustic performance testing apparatus, characterized by, include: An upper shell and a lower shell that interlock with each other, wherein the lower shell is provided with an accommodating space; A flexible seat includes a first plane and a recessed portion lower than the first plane, the first plane being disposed around the periphery of the recessed portion; wherein, the flexible seat is installed inside the lower shell, the first plane being at least partially located within the accommodating space, and the inner bottom of the recessed portion is provided with a mounting hole communicating with the outside, the mounting hole being suitable for mounting an amplifier.

2. The acoustic performance testing apparatus of claim 1, wherein, The lower shell includes a base and a connecting seat. The connecting seat is provided with the accommodating space and an installation space communicating with the accommodating space. The flexible seat is located in the installation space and is sandwiched between the base and the connecting seat.

3. The acoustic performance testing apparatus of claim 2, wherein, The base and the connecting seat are detachably connected.

4. The acoustic performance testing apparatus of claim 2, wherein, The flexible seat also includes a second plane that is lower than the first plane, and the recess and the second plane are located on both sides of the first plane, respectively; The acoustic performance testing device also includes an auxiliary support component, which includes a top plate and a side plate connected together. The top plate is sandwiched between the second plane and the top wall of the installation space, and the side plate is sandwiched between the outer side of the flexible seat and the side wall of the installation space.

5. The acoustic performance testing apparatus of claim 4, wherein, The side plate is threadedly connected to the side wall of the mounting space.

6. The acoustic performance testing apparatus of claim 2, wherein, The base has a through hole corresponding to the recessed portion, and the mounting hole communicates with the outside through the through hole.

7. The acoustic performance testing apparatus of claim 6, wherein, The flexible seat also includes a protrusion protruding from the bottom surface of the flexible seat, the protrusion being provided corresponding to the recess, the mounting hole being a stepped hole, and at least a small-diameter end of the mounting hole being provided at the protrusion; wherein, the protrusion passes through the through hole.

8. The acoustic performance testing apparatus of claim 7, wherein, The via is a stepped hole, the protrusion is inserted into the small diameter end of the via, and the large diameter end of the via is adapted to be threadedly connected to the acoustic performance test receiver.

9. The acoustic performance testing apparatus of any of claims 1 to 8, wherein, The upper shell and the lower shell are rotatably connected. The upper shell is rotatably connected with a hook, and the lower shell is equipped with a buckle that is adapted to engage with the hook. The upper shell and the lower shell define a cavity for receiving, the cavity being in communication with the accommodating space, and the cavity being adapted to fix the electronic device under test.

10. An acoustic performance testing system, characterized by, include: An amplifier, an acoustic performance test receiver, and an acoustic performance test apparatus according to any one of claims 1 to 9; The amplifier is mounted in the mounting hole and is electrically connected to the acoustic performance test receiver.

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