水听器线列阵近场声压测量误差实验研究

Experimental study on the measurement error of sound pressure for linear element hydrophone in near field

本文介绍用于近场声压的测量水听器阵中阵元水听器测量声压的可靠性检验方法和实验结果．提出阵元水听器测量球面波场中声传播衰减曲线与理想球面波声场中声传播衰减曲线对比的检验方法；采用了球面声源声中心测量值对收发距离进行修正的方法；实验水池中对线列阵上十元水听器在球形声源水池中进行了传播衰减曲线的测量分析；验证了基阵的弱散射性能．表明线阵可用于距离小至１／７波长的极近场的扫描测量。

This work is to present a method to verify the reliability of the device for the measurement of pressure in near field. We put forward the verifying method of comparing the transmitting attenuation curves in the spherical field measured by the element hydrophone with that in an ideal spherical field. The distance between the source and the hydrophone is revised by the spherical source's center computed by least-squares fit. Trait of weak scattering field is established. So we arrive at the conclusion that this device can scan an extremely near field of range less than one-seventh wavelength.