水听器复数灵敏度的激光法校准

利用激光测振技术直接检测声场作用下的水介质质点振速,通过推算得到声场中该点声压的幅值和相位,从而可精确校准水听器的复数灵敏度.利用该技术,我们在10～100 kHz频段建立了一套水听器复数灵敏度的校准装置.本文简要介绍了装置的校准原理、方法以及各组成部分,并对Φ20球形水听器进行实验测试.结果表明,激光测振技术是一种有效的校准水听器复数灵敏度的方法,校准结果具有很高的精度.

Calibration of Plural Sensitivity of Hydrophones Using Laser Method

The laser vibration measuring technique can be used to directly measure the water particle vibration velocity caused by the sound field,then the amplitude and phase of acoustic pressure are derived from the measurement.Thereby,the plural sensitivity of the hydrophones can be accurately calibrated.Using this technique,we establish a calibration facility for plural sensitivity of hydrophones within the frequency range from 10kHz to 100kHz.This article introduces the calibration principle,method and every part...