混响声场条件下水声互易传递函数的测量及应用

对不规则的混响声场情况的互易测量方法进行了理论研究,对相关测量误差提出了修正方法。通过测量结果的空间平均和混响环境对声能密度影响的评估,修正了声源体积速度的计算值,并在水中进行了试验验证。经修正后的互易测量结果与正向实测结果基本一致。表明混响声场不影响互易原理有效性的成立,但影响了声源体积速度的计算,进而影响了应用互易原理对传递函数的测量。提出的修正方法在不规则的混响声场情况下简单有效,结论为今后基于互易原理的工程应用提供了参考和依据。 

Application and measurement of underwater acoustic reciprocity transfer functions in reverberant sound field

The reciprocity measurement theory in anomalous reverberant sound fields was investigated. An improved method was proposed due to the interrelated errors. The source volume velocity was corrected by spatial average of measurement results and evaluation of the reverberant sound field influence on acoustic energy density. The result was validated in underwater experiment, corrected reciprocity measurement results were almost the same as direct measurement results. It indicates that reverberant sound field does not affect the validity of the principle, but influences the obtainment of source volume velocity, then influences the measurement of transfer functions with the principle. The proposed method is simple and effective in anomalous reverberant sound fields. The study may be valuable for the applications which are based on the principle.