Method for underwater impulsive sound characteristic measurement in non-anechoic pool

Abstract

A method for measuring the sound power of impulsive sound sources in non-anechoic pool was proposed in this paper, which can also be applied to measure the sound power of other transient sound sources. The characteristic of sound field in enclosed space were presented based on normal-wave theory. By calculating the volume integral of square pressure within local sound field, the interference caused by boundary was eliminated and the steady sound power density of the enclosed space was obtained. The sound power of the source can then be obtained by introducing the sound field transmission relationship from enclosed space to free field. The method was extended to measure the sound power of transient sound sources in non-anechoic pool. The sound power of impulse sound sources was measured by using the method proposed in this paper. The effectiveness of the proposed method was proved by comparing the sound power measured in anechoic pool and non-anechoic pool.