基于双谐振声波幅相控制的高声强级校准  

Calibration of High Sound Intensity Lever Based on Amplitude-Phase Control for Dual Resonance Sound Waves

作　　者：杨晓伟[1] 闫磊[1] 朱刚[1] 刘鑫[1] 白天 YANG Xiao-wei;YAN lei;ZHU Gang;LIU Xin;BAI Tian(Beijing Aerospace Institute for Metrology and Measurement and Technology, Beijing 100076,China)

机构地区：[1]北京航天计量测试技术研究所,北京100076

出　　处：《宇航计测技术》2018年第6期21-24,共4页Journal of Astronautic Metrology and Measurement

摘　　要：对声强测量仪高声强级校准方法的发展历程、现状及水平进行论述,采用两个声压级高、失真度低的声源研发了高声强级校准系统,提出了双谐振声波幅相控制的新方法使声强级校准在频率500Hz时上限可达150dB以上,而失真度小于0.5%。给出高声强校准系统的校准实例和不确定度评估。The calibration methods of high intensity lever for sound intensity probe,its present and history are described.Based on the two sound sources with high-pressure level and low distortion,the high sound intensity lever calibration system has been developed.A new method named amplitude-phase control for dual resonant sound waves is proposed,and new calibration system can generate high sound intensity levels up to150dB at500Hz with distortion(<0.5%).The calibration example and uncertainty evaluation of the new system are also given.

关 键 词：声强测量仪 高声强级 校准 谐振 

分 类 号：O421[理学—声学]