Microphone testing method and testing system

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more

AI Technical Summary

Benefits of technology

This technology uses two different types of microphones: one works well when they're at rest (free) while another works better on moving objects like people). By comparing these microphone responses from both devices, we can determine whether there was any difference between them. If this differences were small enough, indicating no problem during testing, the device would perform good quality tests without requiring too much space and costs more than necessary.

Problems solved by technology

This patented describes different ways to improve the accuracy of detecting tiny sounds made up from multiple components inside a device called a microscope. However, these techniques have their limitations such as requiring direct exposure to ambient environments with strong background noises, expensive equipment, complicated procedures involving building special rooms around them, etc., making it difficult to achieve consistently good levels of precision over time without any significant changes being introduced into the devices themselves due to factors like temperature fluctuations.

Images