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A study on calibration frequency limit of acoustic chamber type microphone calibrator and improvement method using mode shape SCOPUS KCI

Title
A study on calibration frequency limit of acoustic chamber type microphone calibrator and improvement method using mode shape
Authors
Kim, ChayeongShin, KumjaeMoon, Wonkyu
Date Issued
2022-01
Publisher
Acoustical Society of Korea
Abstract
©2022 The Acoustical Society of Korea.This paper identifies the cause of the high frequency calibration limit of the acoustic chamber type calibrator for microphone calibration and presents a method to improve it. By using a commercial finite element analysis software, we analyzed the calibration frequency limit of the acoustic chamber type calibrator through eigen-frequency and frequency domain analysis. Based on this, we designed and fabricated an acoustic chamber type calibrator that can precisely calibrate within 1 dB from about 2 Hz to 6.4 kHz and verified its performance through experiments. The acoustic chamber type calibrator fabricated through this study has the advantage of being able to calibrate multiple microphones simultaneously in a wide frequency range, so it can be usefully used for simple calibration for multiple microphones.Microphone, Microphone calibrator, Sensitivity measurement, Acoustic chamber, Mode shape
URI
https://oasis.postech.ac.kr/handle/2014.oak/110923
DOI
10.7776/ASK.2022.41.1.001
ISSN
1225-4428
Article Type
Article
Citation
Journal of the Acoustical Society of Korea, vol. 41, no. 1, page. 1 - 8, 2022-01
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문원규MOON, WON KYU
Dept of Mechanical Enginrg
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