现代电子技术Issue(24)：94-97,4.
传声器阵列校准技术研究
Calibration technology of microphone array
李元首 1陈宝 1张雪 1姜涛1
作者信息
- 1. 中国航空工业空气动力研究院，黑龙江 哈尔滨 150001
- 折叠
摘要
Abstract
Aerodynamic noise is usually broadband noise. The designed array needs to satisfy the measurement require⁃ments of both high and low frequency signals. The corresponding array form is designed when the frequency range of array mea⁃surement is determined. The noise source localization technology based on microphone array is the core test technique in the wind tunnel aerodynamic noise test technology. The accuracy of noise source localization depends mainly on the microphone ar⁃ray calibration technique. After the microphone phase array is installed,different frequency response and sensitivity,preamplifier, cable laying,power supply,frequency response of signal conditioner and the installation of microphone array can cause the phase difference and amplitude difference among all measurement channels in the data acquisition system. Correction of phase difference and amplitude difference of microphones can make all the microphone frequency responses consistent and ensure the accuracy of test result.关键词
阵列设计/阵列校准/气动噪声/传声器阵列Key words
array design/array calibration/aerodynamic noise/microphone array分类
信息技术与安全科学引用本文复制引用
李元首,陈宝,张雪,姜涛..传声器阵列校准技术研究[J].现代电子技术,2014,(24):94-97,4.
