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.