Microphone test device

Abstract

The invention discloses a microphone test device, comprising a base, an upper cover, a fixing base, a floating joint, a moving device, a guide post, a machine table, upper isolation pads, pressure plates, pressure plate isolation pads, a sound insulation door and a wire. In a state that the floating joint is moved down to a separation position, the floating joint is separated from a top wall of the fixing base and a top of the upper cover at a distance. Through matching of a plurality of upper isolation pads, a plurality of pressure plate isolation pads, a wire hole of the base, the wire holeof the sound insulation door, two sealing plates of the base and two sealing plates of the sound insulation door, according to the microphone test device provided by the invention, low frequency noises can be effectively prevented from being transmitted to the upper cover and the base and entering into a test chamber, a test is prevented from being interfered by noises and resonance, and test accuracy of a to-be-tested microphone is improved.

Description

technical field [0001] The invention relates to a test machine, in particular to a microphone test device for preventing low-frequency noise from entering a test chamber. Background technique [0002] MEMS Microphone is a microphone made using Micro Electrical-Mechanical System technology. It can also be called a microphone chip or a silicon microphone. It is mainly used in mobile phones, Small mobile electronic products such as tablets, laptops, hearing aids, etc. [0003] In order to test the audio characteristics of this microphone, the microphone to be tested must be placed in a microphone testing device, so that the microphone to be tested is isolated from the external sound source and kept in an environment without low-frequency noise to simulate a free sound field. [0004] However, in practice, the existing microphone test setups tend to transmit low-frequency noise to the test chamber through the following parts: [0005] 1. The connector at one end of the mobile ...

AI Technical Summary

Problems solved by technology

[0007] 3. The line hole of the base and the line hole of the soundproof door extend on the same straight line, and low-frequency noise can easily enter the test chamber from the line hole of the soundproof door through the line hole of the base

[0008] 4. The soundproof door cannot completely fix the wire, causing low-frequency noise to be transmitted to the test chamber through the wire

[0009] The microphone under test placed in the test chamber is under the interference of low-frequency noise, noise and resonance, which will affect the test accuracy of the microphone under test, so there is indeed a need for further improvement of the existing microphone test device

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