水池中低频矢量水听器灵敏度校准

The Sensitivity Calibration for Low Frequency Vector Sensor in Tank

在水池中,低频声源与矢量水听器吊放在水池中央,间距小于水池的混响距离,在100～1000Hz范围内测量矢量水听器声压和矢量通道接收信号的灵敏度。对测量得到的灵敏度进行球面修正,可得到矢量水听器声压通道和矢量通道的灵敏度。测量结果表明,这种校准方法能校准低频矢量水听器的灵敏度,结果与理论相符。

In a tank,low frequency sound source and vector sensor is hanged in the middle of the tank,the distance between them is less than reverberation radius of tank,the sensitivity of vector channel in vector sensor is measured over the frequency range 100-1 000 Hz,the data is revised according to spherical expand,then the sensitivity of vector channel in vector sensor is obtained in plane wave. The result of measurement shows that the calibration method can calibrate the sensitivity of low frequency vector sensor,the result of measure and theoretically calculation is identical. The measurement result is consistent with the theoretical calculation.