Noise testing device and method for vehicle exhaust outlets

Abstract

This application provides a noise testing device and method for vehicle exhaust outlets. The noise testing device includes a support rod, a first clamping member, a second clamping member, and a microphone bracket. The first clamping member is detachably connected to the vehicle's exhaust pipe and one end of the support rod, respectively; the second clamping member is detachably connected to the other end of the support rod; and both ends of the microphone bracket are detachably connected to the second clamping member and a microphone, respectively. This application solves the technical problems of poor stability, low accuracy, and low efficiency in existing noise testing brackets.

Description

Technical Field

[0001] This application relates to the field of vehicle testing equipment technology, and more specifically, to a noise testing device and method for vehicle exhaust outlets. Background Technology

[0002] In vehicle noise testing, exhaust noise measurement is a crucial step in evaluating vehicle performance. Currently, technicians typically use a noise testing bracket fixed to the vehicle's tailgate for this purpose.

[0003] However, the low flatness of the vehicle's tailgate makes it difficult to secure the noise test bracket to it, resulting in poor stability. Furthermore, during vehicle acceleration, both the noise test bracket and the exhaust pipe vibrate violently, causing changes in the relative positions of the microphone and the exhaust pipe outlet, reducing the accuracy of the test data. In addition, the existing noise test bracket is time-consuming to install and remove, impacting testing efficiency.

[0004] In other words, existing noise testing brackets suffer from technical problems such as poor stability, low accuracy, and low efficiency.

[0005] There is currently no good solution to the above problems. Summary of the Invention

[0006] This application provides a noise testing device and method for vehicle exhaust outlets, which at least solves the technical problems of poor stability, low accuracy and low efficiency of noise testing brackets in the prior art.

[0007] According to one aspect of the embodiments of this application, a noise testing device for a vehicle exhaust outlet is provided, comprising: a support rod; a first clamping member, the first clamping member being detachably connected to the vehicle's exhaust pipe and one end of the support rod respectively; a second clamping member, the second clamping member being detachably connected to the other end of the support rod; and a microphone bracket, the two ends of the microphone bracket being detachably connected to the second clamping member and a microphone respectively.

[0008] Furthermore, the first clamping member and the second clamping member include: two clamping bodies, each clamping body including at least one arc-shaped segment and multiple straight plate segments, the straight plate segments being connected to both sides of the arc-shaped segment, the corresponding arc-shaped segments of the two clamping bodies being joined together to form a clamping space; and multiple first fasteners, the first fasteners being disposed on the corresponding straight plate segments of the two clamping bodies, the first fasteners being used to lock the two clamping bodies.

[0009] Furthermore, both clamp bodies have multiple arc-shaped segments, and the multiple arc-shaped segments of the first clamping member respectively form a first clamping space and a second clamping space. The first clamping space and the second clamping space are spaced apart. The first clamping space is used to accommodate and fix the exhaust pipe, and the second clamping space is used to accommodate and fix one end of the support rod.

[0010] Furthermore, multiple arc-shaped segments of the second clamping member form a third clamping space, which is used to accommodate and fix the other end of the support rod.

[0011] Furthermore, the microphone bracket includes a connecting part, an adjusting part, and a connecting part connected in sequence. The connecting part is detachably connected to the second clamping member by a second fastener. The adjusting part includes two spaced-apart extensions, and the connecting part includes two spaced-apart bent sections. The adjusting part adjusts the distance between the two extensions by a third fastener to change the distance between the two bent sections.

[0012] Furthermore, the extension section is an elastic section, and the third fastener causes the extension section to deform when it is tightened.

[0013] Furthermore, the microphone stand also includes: a ball-and-socket base, which is located below the connector and integrally connected to the connector, and has a cavity inside; and a ball head, which is located above the adjustment part and integrally connected to the adjustment part, and is rotatably disposed in the cavity.

[0014] Furthermore, the noise testing device also includes a heat shield, which covers at least the outside of the support rod, the first clamp, and the second clamp.

[0015] Furthermore, the noise testing device also includes a shock-absorbing pad located inside the first clamp, the second clamp, and the microphone bracket. The shock-absorbing pad is made of silicone.

[0016] According to another aspect of the embodiments of this application, a noise testing method is also provided. The noise testing method is performed using the above-described noise testing device. The noise testing method includes: placing a first clamping member on the outer surface of an exhaust pipe; fixing one end of a support rod inside the first clamping member and fixing the other end of the support rod inside a second clamping member; installing a microphone into a microphone holder and connecting the microphone holder to the second clamping member; adjusting the position of the microphone so that the microphone is aligned with the outlet of the exhaust pipe; and acquiring test data by collecting exhaust noise signals through the microphone under target test conditions.

[0017] In this embodiment, the noise testing device is detachably connected to the exhaust pipe. A first clamp is connected to the exhaust pipe, and one end of a support rod is fixed to the first clamp, forming a rigid connection between the first clamp and the exhaust pipe. This allows vibrations generated by the exhaust pipe to be synchronously transmitted to the support rod via the first clamp. This detachable connection improves the installation stability and efficiency of the noise testing device, preventing the first clamp from detaching from the vehicle during testing. It also simplifies the installation process and ensures the accuracy and repeatability of test data under dynamic conditions. Simultaneously, the second clamp is detachably connected to the other end of the support rod, ensuring that the first and second clamps are spaced apart, maintaining a distance between the microphone and the exhaust pipe outlet. The microphone bracket is detachably connected to the second clamp and the microphone, allowing the support rod to synchronously transmit the exhaust pipe vibrations to the second clamp, microphone bracket, and microphone. This ensures the microphone is always aligned with the exhaust pipe outlet and maintains a constant distance between the microphone and the exhaust pipe outlet, preventing relative displacement. When the vehicle is accelerating, the microphone moves in sync with the exhaust pipe, thus ensuring the stability of the microphone's noise reception under various operating conditions, improving the accuracy of noise measurement, and solving the technical problems of poor stability, low accuracy, and low efficiency of existing noise test brackets. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of a noise testing device for an automobile exhaust outlet according to an optional embodiment of this application;

[0020] Figure 2 This is a partial structural schematic diagram of a noise testing device for an automobile exhaust outlet according to an optional embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the first clamping member of an optional embodiment of a noise testing device for an automobile exhaust outlet;

[0022] Figure 4 This is a schematic diagram of the structure of the second clamping member of an optional embodiment of the noise testing device for automobile exhaust outlets in this application;

[0023] Figure 5 This is a schematic diagram of the structure of a microphone bracket for a noise testing device for an automobile exhaust outlet according to an optional embodiment of this application;

[0024] Figure 6This is a flowchart of a noise testing method according to an optional embodiment of this application.

[0025] The above figures include the following reference numerals:

[0026] 10. Exhaust pipe; 11. Microphone; 12. Support rod; 13. First clamping component; 14. Second clamping component; 15. Hoop body; 16. Arc-shaped section; 17. Straight section; 18. First fastener; 19. First clamping space; 20. Second clamping space; 21. Third clamping space; 22. Microphone bracket; 23. Connecting part; 24. Second fastener; 25. Adjustment part; 26. Extension section; 27. Connecting part; 28. Bending section; 29. ​​Third fastener; 30. Ball socket base; 31. Ball head; 32. Locking component. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] To address the technical problems of poor stability, low accuracy, and low efficiency in existing noise testing brackets, such as... Figures 1 to 6 As shown in the figure, this application provides a noise testing device and a noise testing method for vehicle exhaust outlets.

[0030] Please see Figures 1 to 5 This application provides a noise testing device for automobile exhaust outlets. The noise testing device includes a support rod 12, a first clamping member 13, a second clamping member 14, and a microphone bracket 22, which are used to stably fix the microphone 11 and accurately collect exhaust noise signals.

[0031] like Figure 1 In the embodiment shown, the first clamp 13 is detachably connected to one end of the vehicle's exhaust pipe 10 and the support rod 12, the second clamp 14 is detachably connected to the other end of the support rod 12, and the two ends of the microphone bracket 22 are detachably connected to the second clamp 14 and the microphone 11, respectively.

[0032] In this embodiment, the noise testing device is detachably connected to the exhaust pipe 10. This is achieved by connecting the first clamping member 13 to the exhaust pipe 10 and fixing one end of the support rod 12 to the first clamping member 13, forming a rigid connection between the first clamping member 13 and the exhaust pipe 10. This allows vibrations generated by the exhaust pipe 10 to be synchronously transmitted to the support rod 12 via the first clamping member 13. This detachable connection improves the installation stability and efficiency of the noise testing device, preventing the first clamping member 13 from detaching from the vehicle during testing. It also simplifies the installation process and ensures the accuracy and repeatability of test data under dynamic operating conditions.

[0033] Meanwhile, the second clamping member 14 is detachably connected to the other end of the support rod 12, ensuring that the first clamping member 13 and the second clamping member 14 are spaced apart, thus maintaining a distance between the microphone 11 and the outlet of the exhaust pipe 10. The microphone bracket 22 is detachably connected to the second clamping member 14 and the microphone 11, so that the support rod 12 synchronously transmits the vibration of the exhaust pipe 10 to the second clamping member 14, the microphone bracket 22, and the microphone 11, ensuring that the microphone 11 is always aligned with the outlet of the exhaust pipe 10 and that the distance between the microphone 11 and the outlet of the exhaust pipe 10 remains constant, preventing relative displacement between them. When the vehicle is accelerating, the microphone 11 moves in sync with the exhaust pipe 10, thereby ensuring the stability of the noise received by the microphone 11 under various operating conditions, improving the accuracy of noise measurement, and thus solving the technical problems of poor stability, low accuracy, and low efficiency of existing noise test brackets.

[0034] In some specific embodiments, the exhaust pipe 10 and the support rod 12 are respectively arranged on both sides or on the same side of the first clamping member 13, and the specific layout can be adjusted according to actual testing requirements.

[0035] In some specific embodiments, the support rod 12, the first clamping member 13, the second clamping member 14, and the microphone bracket 22 are made of aluminum alloy. The surfaces of these components are anodized, providing them with high-temperature resistance and corrosion resistance, thereby extending the service life of the noise testing device. Optionally, the aluminum alloy material is of type 6061-T6, which has the advantages of being lightweight and high-strength.

[0036] In some specific embodiments, the support rod 12 can be a fixed rod or a telescopic rod. The length of the support rod 12 can be adjusted according to testing requirements. However, to maintain stability, the length of the support rod 12 should not exceed 300mm. When the support rod 12 is a telescopic rod, adjusting its length can accommodate the outlet position of the exhaust pipe 10 in different vehicle models while ensuring stability.

[0037] like Figure 2 In the illustrated embodiment, both the first clamping member 13 and the second clamping member 14 include two clamping bodies 15 and multiple first fasteners 18. Each clamping body 15 includes at least one arc-shaped segment 16 and multiple straight segments 17, with the straight segments 17 connected to both sides of the arc-shaped segment 16. When the corresponding arc-shaped segments 16 of the two clamping bodies 15 align, a clamping space is formed. At this time, the corresponding straight segments 17 of the two clamping bodies 15 also come into contact, and the first fasteners 18 are placed on the corresponding straight segments 17 of the two clamping bodies 15 to lock the two clamping bodies 15, thereby closing the clamping space and generating sufficient clamping force. The inner wall of the aforementioned arc-shaped segment 16 can conform to the outer arc surface of the exhaust pipe 10 or the support rod 12, ensuring both the convenience and stability of fixing the exhaust pipe 10 or the support rod 12, and achieving adaptation to exhaust pipes 10 or support rods 12 of different diameters, thereby ensuring the fixation of the relative position between the noise testing device and the exhaust pipe 10.

[0038] In some specific embodiments, the maximum distance between the inner walls of the two corresponding arc-shaped segments 16 in the two clamp bodies 15 that are about to be locked is between 50mm and 120mm, so as to accommodate exhaust pipes 10 or support rods 12 of different diameters.

[0039] like Figure 3 In the illustrated embodiment, each of the two clamping bodies 15 has multiple arc-shaped segments 16, and the multiple arc-shaped segments 16 of the first clamping member 13 respectively form a first clamping space 19 and a second clamping space 20. In some specific embodiments, in the first clamping member 13, each of the two clamping bodies 15 has two arc-shaped segments 16, and correspondingly, each of the two clamping bodies 15 has three straight segments 17. The first clamping space 19 is used to accommodate and fix the exhaust pipe 10, and the second clamping space 20 is used to accommodate and fix one end of the support rod 12. The outline of the first clamping space 19 is matched with the exhaust pipe 10, and the outline of the second clamping space 20 is matched with the support rod 12, so that the first clamping member 13 can fix the exhaust pipe 10 and the support rod 12 simultaneously. Meanwhile, since there is a straight plate section 17 between adjacent arc-shaped segments 16 of a clamp body 15, and the first clamping space 19 and the second clamping space 20 are spaced apart, not only is interference between the exhaust pipe 10 and the support rod 12 avoided, but the assembly steps are also simplified and the compactness of the noise testing device is improved.

[0040] like Figure 4In the illustrated embodiment, unlike the first clamping member 13, the second clamping member 14 has one arc-shaped segment 16 for each of the two clamping bodies 15, and correspondingly, two straight segments 17 for each of the two clamping bodies 15. The multiple arc-shaped segments 16 of the second clamping member 14 form a third clamping space 21, which accommodates and fixes the other end of the support rod 12. Since the outer diameter of the support rod 12 is consistent, the contour of the third clamping space 21 is identical to the contour of the first clamping space 19, and the contour of the third clamping space 21 matches the support rod 12. That is, both ends of the support rod 12 are clamped by the first clamping member 13 and the second clamping member 14, which prevents the support rod 12 from rotating or moving during vibration.

[0041] In some specific embodiments, the first fastener 18, the second fastener 24, and the third fastener 29 can be a combination of bolts and nuts, or a quick-release structure. For example, the bolt is an M8 hex bolt with a torque between 12 N·m and 15 N·m. Another example is a lever-type quick-release buckle, which allows for fixation with a single hand press, suitable for applications requiring frequent disassembly and assembly.

[0042] like Figure 2 In the illustrated embodiment, the microphone holder 22 includes a connecting portion 23, an adjusting portion 25, and a connecting portion 27 connected in sequence. The connecting portion 23 is detachably connected to the second clamping member 14 via a second fastener 24. The adjusting portion 25 includes two spaced-apart extensions 26, and the connecting portion 27 includes two spaced-apart bent sections 28. The adjusting portion 25 adjusts the distance between the two extensions 26 via a third fastener 29 to change the distance between the two bent sections 28, allowing the microphone holder 22 to accommodate microphones 11 of different sizes and shapes. Furthermore, the insertion depth of the microphone 11 into the bent section 28 can be fine-tuned by adjusting the distance of the extensions 26.

[0043] In some specific embodiments, the connecting portion 23, the adjusting portion 25, and the connecting portion 27 of the microphone bracket 22 can be integrally formed by casting or machining.

[0044] When the technician tightens the third fastener 29, the distance between the two extension sections 26 decreases, thereby causing the distance between the two bending sections 28 to also decrease and approach closure, clamping the microphone 11 inside the connecting part 27; when the technician loosens the third fastener 29, the distance between the two extension sections 26 increases, thereby causing the two bending sections 28 to open, and the microphone 11 can be taken out from the connecting part 27.

[0045] In some specific embodiments, the extension segment 26 is an elastic segment. When the third fastener 29 tightens the extension segment 26, it causes the extension segment 26 to deform, thereby providing a continuous clamping force for the microphone 11 and preventing the microphone 11 from loosening.

[0046] like Figure 5 In the illustrated embodiment, to further enhance the spatial adjustability of the microphone 11, the microphone bracket 22 also includes a ball-and-socket base 30 and a ball head 31. The ball-and-socket base 30 is located below and integrally connected to the connecting portion 23, and has a cavity inside. The ball head 31 is located above and integrally connected to the adjusting portion 25, and is rotatably disposed within the cavity. That is, the ball-and-socket base 30 and the ball head 31 are located between the connecting portion 23 and the adjusting portion 25, and are separately disposed, with the ball head 31 able to be embedded within the ball-and-socket base 30. Rotating the ball head 31 within the cavity allows the adjusting portion 25, the connecting portion 27, and the microphone 11 to rotate freely at multiple angles in three-dimensional space.

[0047] In some specific embodiments, a locking member 32 is provided on the outer side of the ball socket base 30. The locking member 32 has a ring structure and can clamp the ball socket base 30, restricting the movement of the ball head 31 inside the ball socket base 30. Therefore, the locking member 32 can fix the relative position of the ball socket base 30 and the microphone 11, so that the microphone 11 is aligned with the outlet of the exhaust pipe 10, keeping the microphone 11 in the optimal pickup position and angle. When it is necessary to adjust the position of the microphone 11, the locking member 32 is removed from the outer side of the ball socket base 30, the ball head 31 is moved to the desired position, and then it is put back on the outer side of the ball socket base 30.

[0048] It should be noted that the fit between the ball head 31 and the ball socket base 30 is small, and there is no looseness after locking, which can provide accurate angle positioning.

[0049] In some specific embodiments, to adapt to the high-temperature environment near the exhaust pipe 10, the noise testing device also includes a heat shield. The heat shield covers at least the outside of the support rod 12, the first clamping member 13, and the second clamping member 14, thereby reflecting and blocking the heat radiated by the exhaust pipe 10 and preventing high temperatures from being transferred to the noise testing device. It should be noted that the heat shield can be made of fiberglass, ceramic fiber, or aluminum foil. If the temperature at the outlet of the exhaust pipe 10 exceeds 300°C, the heat shield needs to cover at least the outside of the support rod 12, the first clamping member 13, and the second clamping member 14 to ensure the normal operation of the noise testing device.

[0050] In some specific embodiments, the noise testing device further includes a shock-absorbing pad located inside the first clamp 13, the second clamp 14, and the microphone bracket 22. Specifically, in the first clamp 13 and the second clamp 14, the shock-absorbing pad is attached to the inner wall of the arc-shaped segment 16 to absorb and attenuate the collision between the arc-shaped segment 16 and the exhaust pipe 10 or the support rod 12, thereby improving the signal-to-noise ratio of the test data and ensuring the accuracy of the measurement results.

[0051] In some specific embodiments, the microphone 11 is positioned at a distance from the outlet of the exhaust pipe 10, and this distance can be set to 50 mm according to the SAE J1470 test standard.

[0052] In some specific embodiments, the connector 27 may have a threaded interface to accommodate different models of microphones 11. For example, a standard 0.5-inch microphone 11 may be used. The inner diameter of the threaded interface is between 12.70 mm and 12.75 mm, and the depth of the threaded interface is between 9.9 mm and 10.0 mm.

[0053] In some specific embodiments, the thickness of the shock-absorbing pad can be between 2mm and 5mm. It should be noted that the shock-absorbing pad is made of silicone.

[0054] In some specific embodiments, the shock-absorbing pads within the bent section 28 of the connecting portion 27 are double-layered, with the outer layer having a higher hardness than the inner layer. Specifically, the outer layer has a Shore A hardness of 50°, while the inner layer has a Shore A hardness of 30°, to ensure that the inner layer conforms more closely to the microphone 11 body, providing damping to prevent the microphone 11 from moving and to attenuate high-frequency vibrations.

[0055] This embodiment provides a noise testing method, which is performed using the aforementioned noise testing device. The flow of the noise testing method in this embodiment is as follows: Figure 6 As shown, the process includes the following steps:

[0056] The first step is to fit the first clamping member 13 onto the outer surface of the exhaust pipe 10, fix one end of the support rod 12 inside the first clamping member 13, and fix the other end of the support rod 12 inside the second clamping member 14.

[0057] The second step is to install the microphone 11 into the microphone holder 22 and connect the microphone holder 22 to the second clamp 14.

[0058] The third step is to adjust the position of the microphone 11 so that the microphone 11 is aligned with the outlet of the exhaust pipe 10;

[0059] The fourth step is to acquire test data by collecting exhaust noise signals through microphone 11 under the target test conditions.

[0060] The noise testing method of this application ensures that the relative positions of the microphone 11 and the exhaust pipe 10 are fixed under acceleration conditions, thereby reducing the fluctuation error of the test data. While ensuring the test accuracy, it expands the compatibility range of exhaust pipes 10 and installation positions of different models.

[0061] It should be noted that during the first step of installation, shock-absorbing pads can be pre-placed inside the first clamp 13, the second clamp 14, and the microphone bracket 22 to enhance the vibration reduction effect. When the first fastener 18, the second fastener 24, and the third fastener 29 are a combination of bolts and nuts, the technician needs to initially tighten the bolts until they cannot be turned by hand, and then use a torque wrench to tighten them in two stages, with torque values ​​of 10 N·m and 15 N·m respectively. Finally, confirm that the microphone 11 is not loose.

[0062] After the noise testing device is installed and its angle is adjusted, its stability and reliability need to be verified. First, vibration conditions are simulated by manually tapping the exhaust pipe 10, and the signal from the microphone 11 is monitored in real time for any abnormal fluctuations to assess the vibration reduction effect. Then, an accelerated test is performed for 10 seconds. Immediately after the test, the relative position of the microphone 11 and the outlet of the exhaust pipe 10 is re-measured to ensure that the microphone 11 remains stable under severe vibration, thus guaranteeing the accuracy and repeatability of the test data. It should be noted that the positional offset of the microphone 11 is within 0.5mm.

[0063] Under the target test conditions, the vehicle's engine is started and accelerated. Exhaust noise signals are collected through microphone 11 and transmitted to an external data acquisition system for analysis and processing to obtain test data. After the test, the second fastener 24 is loosened, the microphone bracket 22 and microphone 11 are removed, the first fastener 18 is loosened, and the first clamp 13 and the second clamp 14 are removed, thus enabling convenient disassembly of the noise testing device.

[0064] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0065] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A noise testing device for vehicle exhaust outlets, characterized in that, include: Support rod (12); The first clamping member (13) is detachably connected to one end of the vehicle's exhaust pipe (10) and the support rod (12); The second clamping member (14) is detachably connected to the other end of the support rod (12); Microphone bracket (22), the two ends of which are detachably connected to the second clamp (14) and the microphone (11), respectively.

2. The noise testing device according to claim 1, characterized in that, The first clamping member (13) and the second clamping member (14) include: Two clamp bodies (15), each clamp body (15) includes at least one arc segment (16) and multiple straight plate segments (17), the straight plate segments (17) are connected to both sides of the arc segment (16), and the arc segments (16) corresponding to the two clamp bodies (15) are joined together to form a clamping space; Multiple first fasteners (18) are provided on the straight plate sections (17) corresponding to the two clamp bodies (15), and the first fasteners (18) are used to lock the two clamp bodies (15).

3. The noise testing device according to claim 2, characterized in that, Both clamp bodies (15) have multiple arc-shaped segments (16), and the multiple arc-shaped segments (16) of the first clamping member (13) respectively form a first clamping space (19) and a second clamping space (20). The first clamping space (19) and the second clamping space (20) are spaced apart. The first clamping space (19) is used to accommodate and fix the exhaust pipe (10), and the second clamping space (20) is used to accommodate and fix one end of the support rod (12).

4. The noise testing device according to claim 2, characterized in that, The plurality of arcuate segments (16) of the second clamping member (14) form a third clamping space (21) for accommodating and fixing the other end of the support rod (12).

5. The noise testing device according to claim 1, characterized in that, The microphone bracket (22) includes a connecting part (23), an adjusting part (25) and a connecting part (27) connected in sequence. The connecting part (23) is detachably connected to the second clamping member (14) by a second fastener (24). The adjusting part (25) includes two spaced-apart extensions (26). The connecting part (27) includes two spaced-apart bent sections (28). The adjusting part (25) adjusts the distance between the two extensions (26) by a third fastener (29) to change the distance between the two bent sections (28).

6. The noise testing device according to claim 5, characterized in that, The extension segment (26) is an elastic segment, and when the third fastener (29) tightens the extension segment (26), it causes the extension segment (26) to deform.

7. The noise testing device according to claim 5, characterized in that, The microphone stand (22) also includes: A ball socket base (30) is located below the connecting part (23) and is integrally connected with the connecting part (23). The ball socket base (30) has a cavity inside. Ball head (31), the ball head (31) is located above the adjustment part (25) and is integrally connected with the adjustment part (25), the ball head (31) is rotatably disposed in the cavity.

8. The noise testing apparatus according to any one of claims 1 to 6, characterized in that, The noise testing device also includes a heat shield, which covers at least the outside of the support rod (12), the first clamp (13), and the second clamp (14).

9. The noise testing apparatus according to any one of claims 1 to 6, characterized in that, The noise testing device also includes a shock-absorbing pad, which is located inside the first clamp (13), the second clamp (14) and the microphone bracket (22), and the shock-absorbing pad is made of silicone.

10. A noise testing method, characterized in that, The noise testing method is performed using the noise testing apparatus according to any one of claims 1 to 9, and the noise testing method includes: The first clamping member (13) is sleeved on the outer surface of the exhaust pipe (10), one end of the support rod (12) is fixed in the first clamping member (13), and the other end of the support rod (12) is fixed in the second clamping member (14); Insert the microphone (11) into the microphone holder (22) and connect the microphone holder (22) to the second clamp (14). Adjust the position of the microphone (11) so that the microphone (11) is aligned with the outlet of the exhaust pipe (10); Under the target test conditions, test data is obtained by collecting exhaust noise signals through the microphone (11).

Images