Device and method for testing pop sound generated by microphone under negative pressure
A test method and microphone technology, applied in electrical components and other directions, can solve the problem of unable to obtain stable and regular FFT audio curve map, difficult analysis, etc., to improve the problem of pop sound abnormal sound, high rigor and high accuracy Effect
Active Publication Date: 2021-05-25
COSONIC INTELLIGENT TECH CO LTD
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Problems solved by technology
Therefore, a stable and regular FFT audio curve spectrum cannot be obtained, which is difficult to analyze
Method used
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[0024] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] Such as figure 1 , figure 2 and image 3 As shown, the present invention is a device for testing the negative pressure of a microphone to produce a pop sound, including a microphone fixture 1, a cylinder 2, a transmission device 3, a reducer 4 and a motor 5; the microphone fixture 1 includes a seat 11, a seat There is a microphone placement cavity inside the body, a cover body 12 is provided on the seat body 11, and the seat body 11 is provided with a seat body air pipe joint 111 communicating with the microphone placement cavity; the power output end of the motor 5 is connected to the reducer 4, and the reducer The power output end of 4 is connected to one end of the transmission device 3, and the other end of the transmission device 3 is connected to the push rod 22 of the cylinder 2; the cylinder...
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The invention discloses a device and method for testing pop sound generated by microphone negative pressure. The device comprises a microphone jig, an air cylinder, a transmission device, a speed reducer and a motor. The microphone jig comprises a base body, a microphone containing cavity is formed in the base body, a cover body is arranged on the base body, and the base body is provided with a base body air pipe connector communicated with the microphone containing cavity. The power output end of the motor is connected with the speed reducer, the power output end of the speed reducer is connected with one end of the transmission device, and the other end of the transmission device is connected with a push rod of the air cylinder. The cylinder is provided with a cylinder air pipe joint, the cylinder air pipe joint is connected with the seat body air pipe joint through an air pipe, and the cylinder is used for exhausting and pushing air in the microphone placing cavity. According to the invention, the negative pressure environment of the microphone can be accurately simulated, the air pushing and exhausting frequency and speed can be accurately controlled, the stability is strong, and the preciseness is high. By analyzing the time delay and the amplitude of the pop sound abnormal sound signal, a good microphone is effectively screened out, so that the pop sound abnormal sound problem occurring when the earphone is worn is improved.
Description
technical field [0001] The invention relates to the technical field of earphone microphone testing, in particular to a device and a testing method for testing a pop sound generated by negative pressure of a microphone. Background technique [0002] At present, earphone users have found that some earphones will have abnormal POP sound when wearing them. After analysis, it is concluded that: under negative pressure, after the airflow flows from the front chamber of the microphone to the rear chamber to restore balance, after the negative pressure suddenly disappears, the vibration of the microphone diaphragm rebound will produce POP sound; in order to verify the above conclusion, use plasticine Wrap the microphone, apply a negative pressure to the microphone with the syringe, use the development board as a sound card, connect the microphone, use the audio processing software Audition to record the transient change of the microphone output voltage over time, and obtain the FFT ...
Claims
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IPC IPC(8): H04R29/00
CPCH04R29/004
Inventor 谢梽黄植足吴文宽李俊平
Owner COSONIC INTELLIGENT TECH CO LTD