Research on Microphone Calibration Technology in High-Temperature Environments
In order to ensure the accuracy of noise measurement in high temperature environment of aero-engine and provide accurate traceability proof,this paper carries out research on microphone calibration technology in high temperature environment,establishes a microphone calibration device in high temperature environment based on resistance wire heating and resonance principle,and conducts traceability research on calibrated microphone through comparative method.The test results show that the proposed method has small sensitivity calibration deviation and good repeatability under high temperature environment with source frequency of 250 Hz,which can effectively realize the calibration of microphone under high temperature environment,make up for the current situation that microphone cannot be traced under high temperature environment,and provide reliable measurement guarantee for the noise measurement of aeroengine.
high temperature environmentmicrophonesensitivity calibration
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