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A kind of microphone test method and test system

A microphone test and microphone technology, applied in the field of microphones, can solve the problems of large error in test results and high cost, achieve low cost, reduce test cost, and achieve simple effects

Active Publication Date: 2018-12-18
GOERTEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a microphone test method and test system to solve the problems of high cost or large error of test results in existing test methods

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  • A kind of microphone test method and test system
  • A kind of microphone test method and test system
  • A kind of microphone test method and test system

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Embodiment Construction

[0033] The inventive concept of the present invention is: by selecting the microphone with known free-field performance as the reference microphone, the sound source, the reference microphone, and the microphone to be tested are arranged in the muffler box, so that the sound signals input by the reference microphone and the microphone to be tested are the same, In this way, the accuracy of the test results of the microphone under test is guaranteed while reducing the test cost and the accuracy requirements for the sound source. There is no need to build a free-field test environment such as a high-cost standard anechoic chamber, and it can also ensure the accuracy of the free-field test results during the test.

[0034] figure 1 It is a flowchart of a microphone testing method provided by an embodiment of the present invention, see figure 1 , this microphone testing method of the present invention comprises:

[0035] Step S110, selecting a microphone with known free-field pe...

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Abstract

The invention discloses a microphone testing method and testing system. The method comprises the following steps: selecting a microphone with known free field performance as a reference microphone; arranging a sounding source, a to-be-tested microphone and the reference microphone in a silencing box, wherein the sounding source is arranged at a central position of the silencing box, a plane where the center of the sounding source is positioned is used as a symmetric plane, and the to-be-tested microphone and the reference microphone are symmetrically arranged on the upper side of the sounding source, so input sound signals of the to-be-tested microphone and the reference microphone are the same; subtracting a test signal obtained by testing of the reference microphone from a test signal obtained by testing of the to-be-tested microphone to obtain a free field test signal of the to-be-tested microphone. The microphone testing method can guarantee the accuracy of the test result of the to-be-tested microphone, the precision requirement on the sounding source for testing is reduced, the size of the silencing box for testing is not required to be over large, and the scheme is easy to realize and low in cost.

Description

technical field [0001] The invention relates to the technical field of microphones, in particular to a microphone testing method and a testing system. Background technique [0002] Currently, the microphones need to be tested for better quality control during the production process of the microphones. There are mainly two existing microphone test methods: one is the near-field test method, in which the microphone to be tested is directly exposed to the environmental sound field or tested in a small silencer box, and its advantages are: the test environment is simple to build and the cost is low , but because the microphone directly receives the surrounding sound, the external noise has a great influence on the test results, which leads to a large error between the test results and the actual performance of the microphone; and when using the silencer box for testing, it is limited by the volume and size of the silencer box. The sound emitted by the sound source is completely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R29/00
Inventor 赵燕鹏李秀高
Owner GOERTEK INC
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