宇航计测技术

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基于双谐振声波幅相控制的高声强级校准

杨晓伟1;闫磊1;朱刚1;刘鑫1;白天1   

  1. 1、北京航天计量测试技术研究所,北京 100076
  • 出版日期:2018-12-25 发布日期:2018-12-25
  • 作者简介:杨晓伟(1964-),男,研究员,主要研究方向:空气声、振动和冲击计量技术研究。

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

YANG Xiao-wei1;YAN lei1;ZHU Gang1;LIU Xin1;BAI Tian1   

  1. 1、Beijing Aerospace Institute for Metrology and Measurement and Technology, Beijing 100076,China
  • Online:2018-12-25 Published:2018-12-25

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。

关键词: 声强测量仪, 高声强级, 校准, 谐振

Abstract: 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 to 150dB at 500Hz with distortion(<0.5%). The calibration example and uncertainty evaluation of the new system are also given.

Key words: Sound intensity probe, Sound intensity lever, Calibration, Resonant vibration