Test fixture and earmuff acoustic performance test system

Abstract

The utility model provides a test fixture, which is suitable for carrying out acoustic performance test on products and comprises an artificial ear and a test tool, the test tool is arranged on the artificial ear and is provided with a material placing position, a plurality of groups of positioning assemblies are distributed on the material placing position, the plurality of groups of positioning assemblies are enclosed to form an accommodating space for accommodating the products, and the accommodating space is used for accommodating the products. The positioning assembly is movably arranged on the discharging position, the size of the containing space is adjusted through movement of the positioning assembly, and the positioning assembly is locked so that the product can be positioned in the containing space. The utility model also provides an earmuff acoustic performance test system, which is suitable for being matched with the test jig to carry out acoustic performance test on products, and comprises a material placing platform and a material pressing mechanism arranged on the material placing platform. According to the earmuff acoustic performance testing system, the compression amount, the pressure value and the acoustic performance of different earmuff materials can be tested and compared, so that better earmuff materials and better forming clamping force can be better selected.

Description

Technical Field

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

[0002] Over-ear headphones typically have larger drivers, providing a wider soundstage and clearer sound quality. Additionally, because they don't insert directly into the ear canal, they reduce friction and pressure, making them comfortable for extended wear. This helps protect hearing to some extent and offers better noise isolation.

[0003] For over-ear headphones, a layer of foam is added to the earcups as an inner lining, covered by an outer shell made of comfortable fabric, soft leather, or protein silk. The choice of earcup foam material has a significant impact on headphone comfort, passive noise cancellation, and active noise cancellation. Current technology involves testing with either an artificial ear or a real person wearing the headphones. Testing with an artificial ear is cumbersome, while testing with a real person requires repeated testing by multiple people. Regardless of whether it's artificial ear testing or real person testing, the consistency and angle of wearing the headphones significantly affect the test results. Therefore, comparing the acoustic performance of different materials requires repeated and extensive testing data. This requires a significant investment of time and manpower, resulting in high testing costs. Furthermore, whether it's artificial ear testing or real person testing, the earcup foam is affected by clamping forces, making it impossible to accurately determine the relationship between a single factor and the acoustic effects and compression in the tested foam material.

[0004] Therefore, it is necessary to provide an earmuff acoustic performance testing system that can compare the compression, pressure, and acoustic performance of different earmuff materials. Utility Model Content

[0005] The purpose of this invention is to provide a test fixture that can perform positioning tests on different earmuff materials.

[0006] The purpose of this invention is to provide an earmuff acoustic performance testing system that can be used in conjunction with the above-mentioned testing fixture to compare and test the compression, pressure, and acoustic performance of different earmuff materials.

[0007] To achieve the above objectives, this utility model provides a testing fixture suitable for acoustic performance testing of products. It includes an artificial ear and a testing fixture. The testing fixture is set on the artificial ear and has a feeding position. Multiple sets of positioning components are distributed on the feeding position. The multiple sets of positioning components form a receiving space for accommodating the product. The positioning components are movably set on the feeding position. The size of the receiving space can be adjusted by the movement of the positioning components, and the positioning components can be locked to position the product within the receiving space.

[0008] Compared with the prior art, the test fixture of this utility model includes an artificial ear and a test tooling. The test tooling is provided with a feeding position, and multiple sets of positioning components are arranged in the feeding position to form a receiving space for accommodating the product. The size of the receiving space can be adjusted by the multiple sets of positioning components to accommodate products of various sizes. Moreover, the product can be stably set in the receiving space by the limiting of the multiple sets of positioning components, thereby enabling better acoustic performance testing.

[0009] Preferably, the material feeding position is evenly distributed with positioning stripes from the inside to the outside, so that the feeding position of the product can be determined by the positioning stripes.

[0010] To achieve another objective mentioned above, this utility model provides an earmuff acoustic performance testing system, suitable for use with the aforementioned testing fixture, to perform acoustic performance testing on products, including:

[0011] The material unloading platform is used to place test fixtures, which are used to place and test products.

[0012] The pressing mechanism includes a fixing component and a pressure testing component. One end of the fixing component is fixed to the feeding platform, and one end of the pressure testing component is slidably disposed on the fixing component. The pressure testing component slides along the fixing component to press the product with different pressures. A pressure sensor is disposed at the end of the pressure testing component away from the fixing component, and the pressure sensor is disposed on the fixing component facing the product.

[0013] Compared with existing technologies, the acoustic performance testing system for earmuffs of this utility model includes a feeding platform and a pressing mechanism disposed on the feeding platform. The feeding platform is used to place the test fixture, and the pressing mechanism cooperates with the test fixture to perform acoustic performance testing on the same product on the test fixture under different pressures, or to perform acoustic performance testing on different products under the same pressure. The pressing mechanism includes a fixing component and a pressure testing component. One end of the fixing component is fixed to the feeding platform, and one end of the pressure testing component is slidably disposed on the fixing component. The pressure testing component slides along the fixing component to press the product with different pressures. For example, the product is a pair of earmuffs for headphones. According to actual testing needs, products of different materials with the same height can be replaced while the pressure testing component is fixed, thereby testing which material has better acoustic performance under the same clamping force. It is also possible to test which force of the same material has better acoustic performance under different pressing forces, thus determining the clamping force required for the molding of the corresponding material. In this invention, a pressure sensor is mounted on the end of the pressure testing component furthest from the fixed component, and the pressure sensor is positioned on the fixed component facing the product. The pressure sensor is used to determine the pressure exerted on the product by the pressure testing component. This earmuff acoustic performance testing system can compare and test the compression, pressure, and acoustic performance of different earmuff materials, thereby enabling better selection of superior earmuff materials and optimal molding clamping force.

[0014] Preferably, the pressure testing assembly includes a pressure testing element, which includes a connecting end and a pressing end. The connecting end is connected to a fixing assembly, and a pressure sensor is mounted on the pressing end.

[0015] Preferably, a locking element is provided on the connecting end, which locks the locking element to position the pressure test piece at a preset position on the fixed component, and releases the locking element to allow the pressure test piece to slide along the fixed component.

[0016] Preferably, the locking element is a fastening screw, or the locking element is a latch.

[0017] Preferably, the connecting end is sleeved on the fixed component and can slide along the fixed component.

[0018] Preferably, the connecting end engages with the fixing component and can slide along the fixing component.

[0019] Preferably, the fixing component includes a fixing rod, one end of which is fixed to the feeding platform, and the fixing rod has graduations evenly distributed along its length.

[0020] Preferably, the pressure testing component is mounted on the fixed component via a sliding component, and the pressure testing component is connected to a power component, which actuates to cause the pressure testing component to slide along the sliding component on the fixed component.

[0021] Preferably, the bottom of the artificial ear is provided with a support portion, and a flexible element is sleeved on the support portion to reinforce the placement of the artificial ear on the support platform; or the support platform is provided with a receiving groove for accommodating the support portion to reinforce the placement of the artificial ear on the support platform. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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 based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of a test fixture provided in one embodiment of the present invention.

[0024] Figure 2 This is a structural diagram of an earmuff acoustic performance testing system provided in an embodiment of the present invention.

[0025] Figure 3 This is a structural diagram of an earmuff acoustic performance testing system provided in another embodiment of the present invention.

[0026] Figure 4 This is a structural diagram of an earmuff acoustic performance testing system provided in another embodiment of this utility model.

[0027] Figure 5 yes Figure 2 A structural diagram from another angle.

[0028] Figure 6 yes Figure 2 Structural diagram of the removed test fixture.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Test fixture; 110. Artificial ear; 1101. Support; 120. Test tooling; 1201. Feeding position; 1202. Positioning stripes; 130. Positioning assembly; 1301. Accommodation space;

[0031] 1000. Earmuff acoustic performance testing system; 101. Pressing mechanism; 1001. Product;

[0032] 10. Material feeding platform;

[0033] 20. Fixing component; 21. Scale;

[0034] 30. Pressure testing assembly; 301. Connecting end; 302. Pressing end; 31. Pressure testing piece; 32. Pressure sensor;

[0035] 40. Locking components;

[0036] 50. Power components;

[0037] 60. Sliding component. Detailed Implementation

[0038] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0039] Please see Figure 1 This utility model provides a test fixture 100 suitable for acoustic performance testing of a product 1001. It includes an artificial ear 110 and a test fixture 120, with the test fixture 120 mounted on the artificial ear 110. The test fixture 120 has a feeding position 1201, with positioning stripes 1202 evenly distributed from the inside out. These positioning stripes 1202 help determine the feeding position of the product 1001, ensuring alignment between the product 1001 and the center of the artificial ear 110, thus enabling better acoustic performance testing. The feeding position 1201 has multiple sets of positioning components 130 distributed on it, forming a receiving space 1301 for accommodating the product 1001. The positioning components 130 are movably mounted on the feeding position 1201, allowing adjustment of the size of the receiving space 1301 by movement, and locking the positioning components 130 to position the product 1001 within the receiving space 1301. The positioning component 130 is provided with an adjustment hole 1302 for adjustment and locking.

[0040] Compared with the prior art, the test fixture 100 of this utility model includes an artificial ear 110 and a test fixture 120. The test fixture 120 is provided with a feeding position 1201, and multiple sets of positioning components 130 are arranged on the feeding position 1201 to form a receiving space 1301 for accommodating the product 1001. The size of the receiving space 1301 can be adjusted by the multiple sets of positioning components 130 to be suitable for products 1001 of various sizes. The product 1001 can be stably set in the receiving space 1301 by the limiting of the multiple sets of positioning components 130, thereby enabling better acoustic performance testing.

[0041] Please see Figures 2 to 6This utility model provides an earmuff acoustic performance testing system 1000, suitable for use with a test fixture 100 to perform acoustic performance testing on a product 1001. The product 1001 can be earmuff foam for headphones or other flexible components requiring acoustic testing. The earmuff acoustic performance testing system 1000 includes a feeding platform 10 and a pressing mechanism 101, with the pressing mechanism 101 disposed on the feeding platform 10. The feeding platform 10 is used to place the test fixture 100, which is used to place and test the product 1001. The pressing mechanism 101 includes a fixing component 20 and a pressure testing component 30. One end of the fixing component 20 is fixed to the feeding platform 10, and one end of the pressure testing component 30 is slidably disposed on the fixing component 20. The pressure testing component 30 can slide automatically or manually along the fixing component 20 to press the product 1001 with different pressures. Specifically, based on actual testing needs, it can be tested which material (product 1001) exhibits superior acoustic performance under different pressing pressures, thus determining the required clamping force for the corresponding material during molding. Furthermore, the pressure testing component 30 can be locked onto the fixing component 20, and then different materials (product 1001) of the same height can be used to test which material (product 1001) exhibits better acoustic performance under the same clamping force. A pressure sensor 32 is located at the end of the pressure testing component 30 furthest from the fixing component 20, and the pressure sensor 32 faces the product 1001 on the fixing component 20 to directly contact the product 1001. Understandably, the pressure sensor 32 is used to determine the pressure value exerted by the pressure testing component 30 on the product 1001, and this pressure value can provide a better numerical reference for the headband design.

[0042] Compared with the prior art, the earmuff acoustic performance testing system 1000 of this utility model includes a feeding platform 10 and a pressing mechanism 101 disposed on the feeding platform 10. The feeding platform 10 is used to place the test fixture 100. The pressing mechanism 101 cooperates with the test fixture 100 to perform acoustic performance testing on the same product 1001 on the test fixture 100 under different pressures, or to perform acoustic performance testing on different products 1001 under the same pressure. The pressing mechanism 101 includes a fixing component 20 and a pressure testing component 30. One end of the fixing component 20 is fixed to the feeding platform 10, and one end of the pressure testing component 30 is slidably disposed on the fixing component 20. The pressure testing component 30 slides along the fixing component 20 to press the product 1001 with different pressures. For example, the product 1001 is an earmuff of a headphone. According to actual testing needs, while the pressure testing component 30 is fixed, products 1001 of different materials with the same height can be replaced. This allows testing to determine which material of product 1001 has better acoustic performance under the same clamping force. Furthermore, it allows testing to determine which force of the same material of product 1001 has better acoustic performance under different pressing forces, thus determining the clamping force required for molding the corresponding material of product 1001. A pressure sensor 32 is installed at the end of the pressure testing component 30 away from the fixing component 20, and the pressure sensor 32 faces the product 1001 from the fixing component 20. The pressure sensor 32 is used to determine the pressure exerted by the pressure testing component 30 on the product 1001. This earmuff acoustic performance testing system 1000 can compare the compression, pressure, and acoustic performance of different earmuff materials, thereby enabling better selection of superior earmuff materials and optimal molding clamping forces.

[0043] Please see Figures 2 to 6 In some optional embodiments, the pressure testing assembly 30 includes a pressure testing element 31, which includes a connecting end 301 and a pressing end 302. The connecting end 301 is connected to the fixing assembly 20, and the pressure sensor 32 is mounted on the pressing end 302. The connecting end 301 slides along the fixing assembly 20 so that the pressing end 302 can approach or move away from the product 1001 on the test fixture 100, and the pressure sensor 32 on the pressing end 302 can directly act on the product 1001, thereby enabling more accurate determination of the pressure value.

[0044] Please see Figure 2 , Figure 3 , Figure 5 and Figure 6In some optional embodiments, a locking member 40 is provided on the connecting end 301. The locking member 40 is locked so that the pressure test piece 31 can be positioned at a preset position on the fixing component 20, thereby enabling the testing of the acoustic performance of products 1001 made of different materials under the same pressure. On the other hand, the locking member 40 is released so that the pressure test piece 31 can slide along the fixing component 20, thereby enabling the testing of which force of pressure on the product 1001 has better acoustic performance under different pressing forces, and thus determining the clamping force required for the product 1001 of the corresponding material during molding.

[0045] like Figure 2 , Figure 5 and Figure 6 As shown, the locking member 40 can be a fastening screw, which locks the pressure test piece 31 to the fixing assembly 20. Removing the fastening screw releases the pressure test piece 31, allowing it to slide up and down along the fixing assembly 20. On the other hand, as... Figure 2 As shown, the locking element 40 can also be a latch, which makes locking and unlocking operations simpler and makes it easier to lock and unlock the pressure test piece 31.

[0046] Please see Figure 2 , Figure 3 , Figure 5 and Figure 6 In some optional embodiments, the connecting end 301 is sleeved on the fixing component 20 and can slide along the fixing component 20. In other embodiments, the connecting end 301 can also be engaged with the fixing component 20 and can slide along the fixing component 20. It is understood that as long as the connecting end 301 can be securely connected to the fixing component 20 and can slide along the fixing component 20, it is acceptable.

[0047] Please see Figures 2 to 6 In some optional embodiments, the fixing component 20 includes a fixing rod, one end of which is fixed to the feeding platform 10. The fixing rod has graduations 21 evenly distributed along its length. The graduations 21 on the fixing rod allow for more precise determination of the sliding position of the pressure test piece 31, thereby enabling better determination of the compression amount and pressure value. The specific shape of the fixing rod can also be customized according to actual usage requirements; the fixing rod can be a round tube or a square tube, etc.

[0048] Please see Figure 6In some optional embodiments, the pressure testing component 30 is mounted on the fixed component 20 via a sliding component 60, and the pressure testing component 30 is connected to a power component 50. Specifically, the power component 50 actuates to cause the pressure testing component 30 to slide along the sliding component 60 on the fixed component 20. The power component 50 allows for more precise and rapid adjustment of the moving position of the pressure testing piece 31. The power component 50 can be a motor lead screw, a motor rack and pinion, or anything else that allows the pressure testing component 30 to slide along the fixed component 20. The power component 50 can also precisely position the pressure testing piece 31 at a specific location without the need for locking by the locking component 40, making operation more convenient and improving positioning accuracy. The sliding component 60 may include a slide rail and a slider.

[0049] Please see Figures 1 to 4 In some optional embodiments, the test fixture 100 includes an artificial ear 110 and a test fixture 120. The test fixture 120 is disposed on the artificial ear 110, and the product 1001 is placed on the test fixture 120. The artificial ear 110 has a support portion 1101 at its bottom, and a flexible element is sleeved on the support portion 1101 to reinforce the placement of the artificial ear 110 on the support platform. Alternatively, the support platform has a receiving groove for accommodating the support portion 1101, which further reinforces the placement of the artificial ear 110 on the support platform. It is understood that the product 1001 contains a speaker, which extends a signal input line to receive a sweep frequency signal. The signal is then retracted through the artificial ear 110. By adjusting the pressure testing component 30, the acoustic curves of the same foam at different heights can be measured, and the pressure values ​​can be read. By changing the product 1001, the compression, pressure values, and acoustic performance of different earmuff foam materials can be tested. The pressure values ​​of different materials can provide a reference for the clamping force in the headgear design.

[0050] like Figures 1 to 6As shown, the earmuff acoustic performance testing system 1000 of this utility model includes a feeding platform 10 and a pressing mechanism 101 disposed on the feeding platform 10. The feeding platform 10 is used to place the test fixture 100. The pressing mechanism 101 cooperates with the test fixture 100 to perform acoustic performance tests on the same product 1001 on the test fixture 100 under different pressures, or to perform acoustic performance tests on different products 1001 under the same pressure. The pressing mechanism 101 includes a fixing component 20 and a pressure testing component 30. One end of the fixing component 20 is fixed to the feeding platform 10, and one end of the pressure testing component 30 is slidably disposed on the fixing component 20. The pressure testing component 30 slides along the fixing component 20 to press the product 1001 with different pressures. For example, the product 1001 is an earmuff of a headphone. According to actual testing needs, while the pressure testing component 30 is fixed, products 1001 of different materials with the same height can be replaced. This allows testing to determine which material of product 1001 has better acoustic performance under the same clamping force. Furthermore, it allows testing to determine which force of pressure results in superior acoustic performance for the same material of product 1001 under different pressing forces, thus determining the required clamping force for the corresponding material during molding. A pressure sensor 32 is installed at the end of the pressure testing component 30 away from the fixing component 20, and the pressure sensor 32 faces the product 1001 from the fixing component 20. The pressure sensor 32 is used to determine the pressure exerted by the pressure testing component 30 on the product 1001. The earmuff acoustic performance testing system 1000 of this invention includes a testing fixture 100, which is applicable to products 1001 of various sizes and can position products 1001 of various sizes. The entire earmuff acoustic performance testing system 1000 can compare and test the compression, pressure and acoustic performance of different earmuff materials, thereby enabling better selection of better earmuff materials and better molding clamping force.

[0051] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A test fixture suitable for testing the acoustic performance of products, characterized in that, The device includes an artificial ear and a testing fixture. The testing fixture is disposed on the artificial ear and has a feeding position. Multiple sets of positioning components are distributed on the feeding position. The multiple sets of positioning components are arranged to form a receiving space for accommodating the product. The positioning components are movably disposed on the feeding position. The size of the receiving space can be adjusted by the movement of the positioning components, and the positioning components can be locked to position the product within the receiving space.

2. The test fixture according to claim 1, characterized in that, The material feeding position is evenly distributed with positioning stripes from the inside to the outside, which can be used to determine the feeding position of the product.

3. An earmuff acoustic performance testing system, characterized in that, Suitable for use with the test fixture according to any one of claims 1-2 to perform acoustic performance testing on the product, including: A feeding platform is used to place the test fixture, which is used to place and test the product. The pressing mechanism includes a fixing component and a pressure testing component. One end of the fixing component is fixed to the feeding platform, and one end of the pressure testing component is slidably disposed on the fixing component. The pressure testing component slides along the fixing component to press the product with different pressures. A pressure sensor is disposed at the end of the pressure testing component away from the fixing component, and the pressure sensor is disposed on the fixing component facing the product.

4. The earmuff acoustic performance testing system according to claim 3, characterized in that, The pressure testing assembly includes a pressure testing element, which includes a connecting end and a pressing end. The connecting end is connected to the fixing assembly, and the pressure sensor is installed on the pressing end.

5. The earmuff acoustic performance testing system according to claim 4, characterized in that, A locking element is provided on the connecting end. The locking element is locked so that the pressure test piece can be positioned at a preset position of the fixing component, and the locking element is released so that the pressure test piece can slide along the fixing component.

6. The earmuff acoustic performance testing system according to claim 5, characterized in that, The locking element is a fastening screw, or the locking element is a latch.

7. The earmuff acoustic performance testing system according to claim 4, characterized in that, The connecting end is sleeved on the fixing component and can slide along the fixing component.

8. The earmuff acoustic performance testing system according to claim 4, characterized in that, The connecting end engages with the fixing component and can slide along the fixing component.

9. The earmuff acoustic performance testing system according to claim 3, characterized in that, The fixing component includes a fixing rod, one end of which is fixed to the feeding platform, and the fixing rod has graduations evenly distributed along its length.

10. The earmuff acoustic performance testing system according to claim 3, characterized in that, The pressure testing component is mounted on the fixed component via a sliding component, and the pressure testing component is connected to a power component. The power component is activated to cause the pressure testing component to slide along the sliding component on the fixed component.

11. The earmuff acoustic performance testing system according to claim 3, characterized in that, The artificial ear has a support portion at its bottom, and a flexible element is fitted on the support portion to reinforce the placement of the artificial ear on the support platform; or the support platform has a receiving groove for accommodating the support portion to reinforce the placement of the artificial ear on the support platform.

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