Mic rod sealing test system

Abstract

The present disclosure provides a microphone rod sealing test system. The microphone rod sealing test system includes a silencer box, a rotary drive mechanism, a clamping mechanism and a sound source component. The silencer box is formed with a silencer cavity, the rotary drive mechanism is fixedly connected to the silencer box, and the power output end of the rotary drive mechanism is located in the silencer cavity. The clamping mechanism is located in the silencer cavity and is fixedly connected to the power output end of the rotary drive mechanism. The sound source component is fixedly connected in the silencer cavity. The clamping mechanism is used to clamp the end of the microphone rod away from the microphone hole, so that the rotary drive mechanism is used to drive the microphone rod to rotate, and the sound source component is used to be arranged opposite to the end of the microphone rod provided with the microphone hole. In this way, the sound leakage gap is avoided from being covered up, and the accuracy of the microphone rod sealing test is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of microphone rod sealing test, and in particular to a microphone rod sealing test system. Background Art

[0002] In the mass production process of headphones, in order to ensure the perfect performance of the CVC voice algorithm, headphone manufacturers usually design a microphone rod for the headphones. The microphone rod is equivalent to a rod-shaped microphone. A microphone head is set inside one end of the microphone rod, and a microphone hole is opened on the microphone rod, and the microphone hole is set corresponding to the microphone head. In the manufacturing process of the microphone rod, the microphone rod is prone to sealing problems, that is, the sound generated by the external sound source is transmitted to the inside of the microphone rod through the sound leakage gap outside the microphone hole, generating an electrical signal that is not actually needed, causing the performance of the microphone rod to deteriorate. Therefore, the sealing of the microphone rod is very important, which is extremely strict for manufacturing requirements. At the same time, testing the sealing of the microphone rod is also a great challenge.

[0003] In the related art, the sealing test of the microphone is generally carried out by testing the frequency-response curve of the microphone. The sealing of the tested microphone is determined based on the difference in the frequency response of the microphone at low frequencies. The greater the difference, the stronger the sealing of the product.

[0004] However, in the above-mentioned test scheme, a frequency response curve test unit is generally used to test the microphone unit to obtain its frequency response curve, and then the leakage of the microphone unit is determined by observing the response size corresponding to the curve at low frequency. In the actual prior art, the leakage of the microphone unit is mainly determined by analyzing the tested frequency response curve with reference to the experience of the tester. The test results are inaccurate, and it is difficult to accurately compare and quantify the sealing of different microphone units, making it difficult to make an accurate judgment.

[0005] In order to avoid the problem of judging the test structure by experience, CN102572671A discloses a microphone sealing test method, a test tool and a test system. During the test, the microphone to be tested is fixed so that the microphone to be tested receives the sound signal emitted by the first test sound source only through the sound inlet hole, and receives the sound signal emitted by the second test sound source only through the non-sound inlet hole structure part; the first frequency response curve under the condition of opening the first test sound source and closing the second test sound source is tested; the second frequency response curve under the condition of opening the first test sound source and the second test sound source at the same time is tested; the sealing of the microphone to be tested is determined by the difference between the first frequency response curve and the second frequency response curve. Among them, in order to make the microphone receive the sound signal emitted by the first test sound source only through the sound inlet hole, and make the microphone to be tested receive the sound signal emitted by the second test sound source only through the non-sound inlet hole structure part, the microphone is fixed by the test tool, and the lifting device and the adjustment end need to cooperate to give appropriate pressure to the microphone unit, so that the microphone and the test device are more tightly coupled.

[0006] However, when the above test scheme is applied to the test of the microphone rod, the two ends of the microphone rod will be subjected to pressure, resulting in a greater risk of breaking the microphone rod. Even if the microphone rod is not broken, the force applied to the two ends of the microphone rod will deform the microphone rod, thereby changing the size of the sound leakage gap of the microphone rod, resulting in lower accuracy of the sealing test.

[0007] Since the microphone rod has the risk of breaking or even snapping when using the above test method, the industry generally does not use the above test method to test the sealing of the microphone rod. Therefore, the relevant technology also provides a method for sealing test, for example, CN108260068A-Microphone sealing test method and device, placing a test product with at least one microphone in a muffler; starting a microphone on the test product, turning off other microphones on the test product, generating a test sound in the muffler, and obtaining the normal frequency response value of the activated microphone; blocking the sound hole on the test product corresponding to the activated microphone, generating a test sound in the muffler, and obtaining the blocked frequency response value of the activated microphone; comparing the normal frequency response value and the blocked frequency response value, obtaining the frequency response difference, and judging whether the frequency response difference is greater than the preset difference.

[0008] It can be seen from this that when testing the sealing of the microphone, the sound hole of the microphone needs to be blocked. When the above method is applied to the sealing test of the microphone rod, it is necessary to use a cylinder to push a sealing structure such as silicone to seal the microphone hole of the microphone rod. To ensure the sealing, the thrust of the cylinder is relatively large, and the microphone hole is opened at one end of the microphone rod, resulting in a large thrust on the end of the microphone rod. In order to prevent the microphone rod from being pushed when sealing, the non-sealed parts of the microphone rod are clamped by the clamp, that is, the end of the microphone rod away from the microphone hole and the middle are clamped by the clamp. At the same time, since the microphone rod is subjected to a large thrust by the cylinder, in order to ensure the position stability of the microphone rod, the clamping force acting on the microphone rod is relatively large.

[0009] However, although this test method can avoid the drawbacks of empirical judgment results and the risk of microphone rod breakage, since the end of the microphone rod away from the microphone hole and the middle are clamped by the clamp and the clamping force of the clamp is relatively large, the clamp is more likely to close the sound leakage gap of the microphone rod, that is, the clamp is more likely to cover the gap of the microphone rod itself, resulting in the risk of undetectable air leakage of the microphone rod, which in turn leads to room for improvement in the accuracy of the sealing test.

[0010] It should be noted that after diligently performing the creative novelty search of this scheme, the following technical literature is also provided for reference:

[0011] 1. CN112714391A - Microphone internal sealing test method, device and computer equipment;

[0012] 2. CN109275084A - Microphone array test method, device, system, equipment and storage medium;

[0013] 3. CN116723452A-A speaker sealing test method.

[0014] In conclusion, there is an urgent need to avoid the risk of undetectable leakage and to improve the accuracy of the microphone rod sealing test. Utility Model Content

[0015] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a microphone sealing test system that avoids the problem of covering up sound leakage defects and improves the accuracy of sealing tests.

[0016] The purpose of this disclosure is achieved through the following technical solutions:

[0017] A microphone rod sealing test system, comprising:

[0018] A muffler box is formed with a muffler cavity;

[0019] A rotary drive mechanism is fixedly connected to the muffler box, and a power output end of the rotary drive mechanism is located in the muffler cavity;

[0020] a clamping mechanism, located in the muffler chamber and fixedly connected to the power output end of the rotary drive mechanism; and

[0021] A sound source component, fixedly connected to the silencing cavity;

[0022] Wherein, the clamping mechanism is used to clamp the end of the microphone rod away from the microphone hole, so that the rotation drive mechanism is used to drive the microphone rod to rotate, and the sound source component is used to be arranged opposite to the end of the microphone rod with the microphone hole.

[0023] In some embodiments, the sound-absorbing box comprises:

[0024] a box body, the muffler cavity being formed inside the box body; and

[0025] The sound-absorbing structure is located in the sound-absorbing cavity and completely covers the inner wall of the sound-absorbing cavity.

[0026] In some embodiments, the sound-absorbing structure includes a sound-absorbing mud layer, and the sound-absorbing mud layer completely covers the inner wall of the sound-absorbing cavity.

[0027] In some of the embodiments, the sound-absorbing structure further includes a sound-absorbing cotton layer, and the sound-absorbing cotton layer completely covers the side of the sound-insulating mud layer away from the inner wall of the sound-absorbing cavity.

[0028] In some embodiments, the sound-absorbing structure further includes a wave-absorbing cotton layer, and the wave-absorbing cotton layer completely covers the side of the sound-absorbing cotton layer away from the sound-insulating mud layer.

[0029] In some embodiments, the sound-absorbing structure further includes a sound-absorbing peak layer, which is connected to a side of the absorbing cotton layer away from the sound-absorbing cotton layer, and the sound-absorbing peak layer faces the inner wall of the sound-absorbing cavity.

[0030] In some embodiments, the silencing chamber has a first inner wall, a second inner wall, a third inner wall and a fourth inner wall connected end to end in sequence, the first inner wall is perpendicular to the second inner wall, and the first inner wall is also perpendicular to the fourth inner wall.

[0031] In some embodiments, the angle between the second inner wall and the third inner wall is 100° to 120°, and the angle between the third inner wall and the fourth inner wall is 60° to 80°.

[0032] In some of the embodiments, the distance between the sound source component and the top of the sound-absorbing box is 40 cm to 70 cm.

[0033] In some embodiments, the distance between the sound source component and the microphone rod is 30 cm to 50 cm.

[0034] Compared with the prior art, the present invention has at least the following advantages:

[0035] During the test, the microphone rod is rotated so that the side of the microphone rod away from the microphone hole is directed toward the sound output end of the sound source component, so that the sound emitted by the sound source component cannot be directly transmitted to the microphone hole. Since the sound-absorbing box has a sound-absorbing effect, the sound emitted by the sound source component will not be emitted to the microphone hole, so that the microphone hole of the microphone rod cannot receive the sound of the sound source component, that is, the microphone hole of the microphone rod is equivalent to being sealed, avoiding the use of a sealing structure to seal the microphone hole, and thus avoiding the microphone rod from being subjected to the thrust required for sealing, that is, the microphone rod is not subjected to a thrust during the test; compared with the traditional test method, since the microphone rod is not subjected to a thrust during the test, the clamping force acting on the microphone rod is designed to be smaller, that is, a smaller clamping force can maintain the position stability of the microphone rod, and there is no need to consider the problem of the microphone rod being pushed, so the clamping force can only act on the end of the microphone rod away from the microphone hole, avoiding the sound leakage gap from being covered, and improving the accuracy of the microphone rod sealing test. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic structural diagram of a microphone rod sealing test system according to an embodiment;

[0038] Figure 2 for Figure 1 The enlarged schematic diagram of the microphone rod sealing test system at point A is shown.

[0039] Reference numerals: 10, microphone rod sealing test system; 100, muffler box; 101, muffler chamber; 110, box body; 111, first inner wall; 112, second inner wall; 113, third inner wall; 114, fourth inner wall; 120, muffler structure; 121, sound insulation mud layer; 122, sound absorbing cotton layer; 123, wave absorbing cotton layer; 124, sound absorbing peak layer;

[0040] 200, rotary drive mechanism;

[0041] 300, clamping mechanism;

[0042] 400, audio source parts;

[0043] 500, fixings;

[0044] 20. Microphone. DETAILED DESCRIPTION

[0045] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0048] The present disclosure provides a microphone rod sealing test system, which is tested by the microphone rod sealing test method mentioned above. The microphone rod sealing test system includes a muffler box, a rotary drive mechanism, a clamping mechanism and a sound source component. The muffler box is formed with a muffler cavity, the rotary drive mechanism is fixedly connected to the muffler box, and the power output end of the rotary drive mechanism is located in the muffler cavity, the clamping mechanism is located in the muffler cavity and is fixedly connected to the power output end of the rotary drive mechanism, the muffler cavity has a accommodating area, one end of the accommodating area is a clamping partition, the clamping partition coincides with the clamping end of the clamping mechanism, and the other end of the accommodating area is a sound receiving partition. The sound source component is fixedly connected in the muffler cavity, and the sound output end of the sound source component is arranged opposite to the sound receiving partition. Among them, the clamping mechanism is used to clamp the end of the microphone rod away from the microphone hole, so that the rotary drive mechanism is used to drive the microphone rod to rotate.

[0049] In the above-mentioned microphone rod sealing test system, during the test, the microphone rod is rotated so that the side of the microphone rod away from the microphone hole is directed toward the sound output end of the sound source component, thereby preventing the sound emitted by the sound source component from being directly transmitted to the microphone hole. Since the sound-absorbing box has a sound-absorbing effect, the sound emitted by the sound source component will not be emitted to the microphone hole, so that the microphone hole of the microphone rod cannot receive the sound of the sound source component, that is, the microphone hole of the microphone rod is equivalent to being sealed, thereby avoiding the use of a sealing structure to seal the microphone hole, thereby avoiding the microphone rod from being subjected to the thrust required for sealing, that is, the microphone rod is not subjected to a thrust during the test; compared with the traditional test method, since the microphone rod is not subjected to a thrust during the test, the clamping force acting on the microphone rod is designed to be smaller, that is, a smaller clamping force can maintain the position stability of the microphone rod, and there is no need to consider the problem of the microphone rod being pushed, so the clamping force can only act on the end of the microphone rod away from the microphone hole, thereby avoiding the sound leakage gap from being covered, thereby improving the accuracy of the microphone rod sealing test.

[0050] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0051] like Figure 1 and Figure 2As shown, a microphone rod sealing test system 10 of an embodiment includes a muffler box 100, a rotary drive mechanism 200, a clamping mechanism 300 and a sound source component 400. The muffler box 100 is formed with a muffler cavity 101, the rotary drive mechanism 200 is fixedly connected to the muffler box 100, and the power output end of the rotary drive mechanism 200 is located in the muffler cavity 101. The clamping mechanism 300 is located in the muffler cavity 101 and is fixedly connected to the power output end of the rotary drive mechanism 200. The rotary drive mechanism 200 is used to drive the clamping mechanism 300 to rotate, and the sound source component 400 is fixedly connected to the muffler cavity 101.

[0052] like Figure 1 As shown, further, the clamping mechanism 300 is used to clamp the end of the microphone rod 20 away from the microphone hole, so that the rotation drive mechanism 200 is used to drive the clamping mechanism 300 and the microphone rod 20 to rotate synchronously, and the sound source component 400 is used to be arranged opposite to the end of the microphone rod 20 with the microphone hole. When performing a sealing test, the end of the microphone rod 20 away from the microphone hole is clamped on the clamping mechanism 300, and the microphone hole of the microphone rod 20 is directed toward the sound output end of the sound source component 400; the microphone rod 20 is tested when the sound source component 400 is turned on to obtain a first acoustic curve; the rotating drive mechanism 200 drives the clamping mechanism 300 and the microphone rod 20 to rotate synchronously, so that the side of the microphone rod 20 away from the microphone hole is directed toward the sound output end of the sound source component 400; the microphone rod 20 is tested when the sound source component 400 is turned on to obtain a second acoustic curve; the difference between the first acoustic curve and the second acoustic curve is calculated, and the difference is compared with a preset standard range value. When the difference is within the preset standard range value, it is determined that the sealing of the microphone rod 20 is qualified.

[0053] It should be noted that the sound leakage gap is formed at the joint of the external parts of the microphone rod 20. In the microphone rod 20 of the present disclosure, the joint of the external parts of the microphone rod 20 and the microphone hole are respectively located on two opposite sides of the microphone rod 20. Therefore, when the side of the microphone rod 20 away from the microphone hole is toward the sound output end of the sound source component 400, the sound of the sound source component 400 can be directly transmitted to the joint of the external parts of the microphone rod 20.

[0054] In the microphone rod sealing test system 10, during the test, the microphone rod 20 is rotated so that the side of the microphone rod 20 away from the microphone hole is directed toward the sound output end of the sound source component 400, so that the sound emitted by the sound source component 400 cannot be directly transmitted to the microphone hole. Since the sound-absorbing box 100 has a sound-absorbing effect, the sound emitted by the sound source component 400 will not be emitted to the microphone hole, so that the microphone hole of the microphone rod 20 cannot receive the sound of the sound source component 400, that is, the microphone hole of the microphone rod 20 is equivalent to being sealed, avoiding the use of a sealing structure to seal the microphone hole, and further This avoids the microphone rod 20 from being subjected to the thrust required for sealing, that is, the microphone rod 20 is not subjected to the thrust during the test; compared with the traditional test method, since the microphone rod 20 is not subjected to the thrust during the test, the clamping force acting on the microphone rod 20 is designed to be smaller, that is, a smaller clamping force can maintain the position stability of the microphone rod 20, and there is no need to consider the problem of the microphone rod 20 being pushed, so the clamping force can only act on the end of the microphone rod 20 away from the microphone hole, thereby avoiding the sound leakage gap from being covered up, thereby improving the accuracy of the sealing test of the microphone rod 20.

[0055] like Figure 1 As shown, in some embodiments, the sound-absorbing box 100 includes a box body 110 and a sound-absorbing structure 120, the sound-absorbing cavity 101 is formed inside the box body 110, and the sound-absorbing structure 120 is located in the sound-absorbing cavity 101 and completely covers the inner wall of the sound-absorbing cavity 101. In this embodiment, when the sound is transmitted to the sound-absorbing structure 120, the sound-absorbing structure 120 absorbs the sound and avoids sound reflection, and also plays a role in isolating external sound, avoiding external sound interference with the test, and improving the accuracy of the test.

[0056] like Figure 1 and Figure 2 As shown, in some of the embodiments, the sound-absorbing structure 120 includes a sound-absorbing mud layer 121 , and the sound-absorbing mud layer 121 completely covers the inner wall of the sound-absorbing cavity 101 , and the sound-absorbing mud layer 121 is used to isolate and absorb sound.

[0057] like Figure 2 As shown, further, the sound-absorbing structure 120 also includes a sound-absorbing cotton layer 122, which completely covers the side of the sound-insulating mud layer 121 away from the inner wall of the sound-absorbing chamber 101, so that the sound-absorbing structure 120 also absorbs sound and isolates external sound through the sound-absorbing cotton layer 122, thereby improving the sound absorption and sound insulation effects.

[0058] like Figure 2 As shown, further, the sound-absorbing structure 120 also includes an absorbing cotton layer 123, which completely covers the side of the sound-absorbing cotton layer 122 away from the sound-insulating mud layer 121, so that the sound-absorbing structure 120 also absorbs sound and isolates external sound through the absorbing cotton layer 123, thereby improving the sound absorption and sound insulation effects.

[0059] like Figure 2As shown, in some embodiments, the sound-absorbing structure 120 also includes a sound-absorbing peak layer 124, which is connected to the side of the absorbing cotton layer 123 away from the sound-absorbing cotton layer 122, and the sound-absorbing peak layer 124 faces the inner wall of the sound-absorbing cavity 101. When sound is transmitted to the sound-absorbing peak layer 124, the sound-absorbing peak layer 124 can absorb the sound, thereby improving the sound absorption effect.

[0060] like Figure 1 As shown, in some embodiments, the silencer chamber 101 has a first inner wall 111, a second inner wall 112, a third inner wall 113 and a fourth inner wall 114 which are connected end to end in sequence, and the first inner wall 111 is perpendicular to the second inner wall 112, and the first inner wall 111 is also perpendicular to the fourth inner wall 114 to improve the sound absorption effect of the silencer box 100.

[0061] like Figure 1 As shown, further, the angle between the second inner wall 112 and the third inner wall 113 is 100° to 120°, and the angle between the third inner wall 113 and the fourth inner wall 114 is 60° to 80°, so that the sound absorption effect of the soundproof box 100 is better.

[0062] like Figure 1 As shown, further, the angle between the second inner wall 112 and the third inner wall 113 is 100°, and the angle between the third inner wall 113 and the fourth inner wall 114 is 70°, so that the sound absorption effect of the soundproof box 100 is better.

[0063] like Figure 1 As shown, in some embodiments, the distance between the sound source component 400 and the top of the sound-absorbing box 100 is 40 cm to 70 cm. Further, the distance between the sound source component 400 and the top of the sound-absorbing box 100 is 60 cm.

[0064] like Figure 1 As shown, in some embodiments, the distance between the sound source component 400 and the microphone rod 20 is 30 cm to 50 cm. Further, the distance between the sound source component 400 and the microphone rod 20 is 45 cm.

[0065] like Figure 1 As shown, in some embodiments, the silencing chamber 101 has a first inner wall 111, a second inner wall 112, a third inner wall 113 and a fourth inner wall 114 which are connected end to end in sequence, the first inner wall 111 is perpendicular to the second inner wall 112, the first inner wall 111 is also perpendicular to the fourth inner wall 114, the angle between the second inner wall 112 and the third inner wall 113 is 100°, and the angle between the third inner wall 113 and the fourth inner wall 114 is 70°.

[0066] like Figure 1As shown, in some embodiments, the rotary drive mechanism 200 is a motor. Of course, the rotary drive mechanism 200 is not limited to a motor. For example, in other embodiments, the rotary drive mechanism 200 can also be a rotary cylinder, a hand wheel or other existing optional drive members.

[0067] like Figure 1 As shown, in some of the embodiments, the clamping mechanism 300 is a clamping cylinder. Of course, the clamping mechanism 300 is not limited to the clamping cylinder. For example, in some other embodiments, the clamping mechanism 300 can be an elastic sleeve, an elastic clamping claw or other existing clamping mechanisms 300.

[0068] like Figure 1 As shown, in some embodiments, the mounting end of the rotary drive mechanism 200 is fixedly connected to the outside of the muffler box 100, and the power output end of the rotary drive mechanism 200 is arranged in the muffler box 100, so as to reduce the structure arranged in the muffler cavity 101, reduce the reflection surface in the muffler cavity 101, and improve the muffler effect of the muffler box 100. Of course, in other embodiments, the mounting end of the rotary drive mechanism 200 can also be fixedly connected to the inner wall of the muffler cavity 101.

[0069] like Figure 1 As shown, in some of the embodiments, the microphone rod sealing test system 10 also includes a sound-absorbing coating layer, which covers the fixed end connected to the clamping mechanism 300. The sound-absorbing coating layer can absorb sound, suppress the sound reflected by the clamping mechanism 300, improve the sound-absorbing effect, and thereby improve the accuracy of the sealing test.

[0070] like Figure 1 As shown, in some embodiments, the sound-absorbing box 100 further includes a fixing member 500 , which is located in the sound-absorbing chamber 101 , one end of the fixing member 500 is fixedly connected to the box body 110 , and the sound source component 400 is fixedly connected to the other end of the fixing member 500 .

[0071] like Figure 1 As shown, further, the sound absorbing box 100 also includes a sound absorbing coating layer, which covers the surface connected to the fixing part 500. The sound absorbing coating layer can absorb sound, avoid the fixing part 500 from reflecting sound, improve the sound absorbing effect, and further improve the accuracy of the sealing test.

[0072] like Figure 1As shown, in some embodiments, the microphone rod sealing test system 10 further includes a sound insulation mechanism, which includes an extension drive and a sound insulation board. The extension drive is fixedly connected to the muffler box 100, and the power output end of the extension drive is located in the muffler chamber 101. The sound insulation board is fixedly connected to the power output end of the extension drive. The extension drive is used to drive the sound insulation board to move to the bottom of the microphone rod 20, so that the sound insulation board isolates the microphone hole from the bottom of the muffler box 100. In this embodiment, when the side of the microphone rod 20 away from the microphone hole is facing the sound source component 400, the extension drive drives the sound insulation board to move to the bottom of the microphone rod 20, so that the sound insulation board isolates the microphone hole from the bottom of the muffler box 100. When there is a problem with the bottom muffler of the muffler box 100, the isolation board can isolate the sound reflected from the bottom of the muffler box 100, thereby preventing the sound reflected from the bottom of the muffler box 100 from being transmitted to the microphone hole, reducing the interference of the sealing test, and improving the accuracy of the sealing test.

[0073] Furthermore, the sound insulation mechanism also includes a sound absorbing coating layer, which covers the mounting end connected to the protruding driving member to suppress the sound reflected by the protruding driving member, thereby improving the accuracy of the sealing test.

[0074] In some embodiments, the microphone rod sealing test system 10 further includes a detector, which is used to be bonded to a side of the microphone rod 20 provided with a microphone hole. In some embodiments, the microphone rod sealing test system 10 further includes an alarm, which is arranged outside the muffler box 100 to prevent the alarm signal emitted by the alarm from being covered by the muffler box 100, thereby improving the visibility of the alarm signal.

[0075] Compared with the prior art, the present invention has at least the following advantages:

[0076] During the test, the microphone rod is rotated so that the side of the microphone rod away from the microphone hole is directed toward the sound output end of the sound source component, so that the sound emitted by the sound source component cannot be directly transmitted to the microphone hole. Since the sound-absorbing box has a sound-absorbing effect, the sound emitted by the sound source component will not be emitted to the microphone hole, so that the microphone hole of the microphone rod cannot receive the sound of the sound source component, that is, the microphone hole of the microphone rod is equivalent to being sealed, avoiding the use of a sealing structure to seal the microphone hole, and thus avoiding the microphone rod from being subjected to the thrust required for sealing, that is, the microphone rod is not subjected to a thrust during the test; compared with the traditional test method, since the microphone rod is not subjected to a thrust during the test, the clamping force acting on the microphone rod is designed to be smaller, that is, a smaller clamping force can maintain the position stability of the microphone rod, and there is no need to consider the problem of the microphone rod being pushed, so the clamping force can only act on the end of the microphone rod away from the microphone hole, avoiding the sound leakage gap from being covered, and improving the accuracy of the microphone rod sealing test.

[0077] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A microphone rod sealing test system, characterized in that: include: A muffler box (100) is formed with a muffler cavity (101); A rotary drive mechanism (200) is fixedly connected to the muffler box (100), and a power output end of the rotary drive mechanism (200) is located in the muffler chamber (101); A clamping mechanism (300) is located in the muffler chamber (101) and is fixedly connected to a power output end of the rotary drive mechanism (200); as well as A sound source component (400) is fixedly connected to the silencing chamber (101); The clamping mechanism (300) is used to clamp the end of the microphone rod (20) away from the microphone hole, so that the rotation drive mechanism (200) is used to drive the microphone rod (20) to rotate, and the sound source component (400) is used to be arranged opposite to the end of the microphone rod (20) provided with the microphone hole.

2. The microphone rod sealing test system according to claim 1, characterized in that: The muffler box (100) comprises: A box body (110), wherein the muffler chamber (101) is formed inside the box body (110); and The sound-absorbing structure (120) is located in the sound-absorbing cavity (101) and completely covers the inner wall of the sound-absorbing cavity (101).

3. The microphone rod sealing test system according to claim 2, characterized in that: The sound-absorbing structure (120) comprises a sound-absorbing mud layer (121), and the sound-absorbing mud layer (121) completely covers the inner wall of the sound-absorbing cavity (101).

4. The microphone rod sealing test system according to claim 3, characterized in that: The sound-absorbing structure (120) further comprises a sound-absorbing cotton layer (122), wherein the sound-absorbing cotton layer (122) completely covers a side of the sound-insulating mud layer (121) that is away from the inner wall of the sound-absorbing cavity (101).

5. The microphone rod sealing test system according to claim 4, characterized in that: The sound-absorbing structure (120) further comprises a wave-absorbing cotton layer (123), wherein the wave-absorbing cotton layer (123) completely covers the side of the sound-absorbing cotton layer (122) facing away from the sound-insulating mud layer (121).

6. The microphone rod sealing test system according to claim 5, characterized in that: The sound-absorbing structure (120) further comprises a sound-absorbing peak layer (124), wherein the sound-absorbing peak layer (124) is connected to a side of the wave-absorbing cotton layer (123) facing away from the sound-absorbing cotton layer (122), and the sound-absorbing peak layer (124) faces the inner wall of the sound-absorbing cavity (101).

7. The microphone rod sealing test system according to claim 2, characterized in that: The muffler chamber (101) comprises a first inner wall (111), a second inner wall (112), a third inner wall (113) and a fourth inner wall (114) which are connected end to end in sequence; the first inner wall (111) is perpendicular to the second inner wall (112), and the first inner wall (111) is also perpendicular to the fourth inner wall (114).

8. The microphone rod sealing test system according to claim 7, characterized in that: The included angle between the second inner wall (112) and the third inner wall (113) is 100° to 120°, and the included angle between the third inner wall (113) and the fourth inner wall (114) is 60° to 80°.

9. The microphone rod sealing test system according to claim 1, characterized in that: The distance between the sound source component (400) and the top of the sound-absorbing box (100) is 40 cm to 70 cm.

10. The microphone rod sealing test system according to claim 1, characterized in that: The distance between the sound source component (400) and the microphone rod (20) is 30 cm to 50 cm.

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