Influences of prolate spheroidal baffle of sound diffraction on spatial directivity of acoustic vector sensor

Abstract

The directivity of acoustic vector sensor (AVS) will be distorted by the sound diffraction of the AVS carrier. In this paper, the scattering of a plane acoustic wave from a prolate spheroid baffle is considered. At first, the sound diffraction of prolate spheroidal baffle is established, then the mathematical expressions of sound pressure field and particle vibration velocity field of sound diffraction are derived and the characteristic of the directivity of pressure and velocity of sound diffraction field at different frequencies and distances is analyzed. The directivity of AVS is determined by the amplitude and phase difference of diffraction wave and incident wave, which possesses a close relationship with frequency and incident angle. Finally, the calculated results are compared with the experimental results.prolate spheroidal baffle, sound diffraction field, spatial directivity, vector sensor Citation:Ji J F, Liang G L, Wang Y, et al. Influences of prolate spheroidal baffle of sound diffraction on spatial directivity of acoustic vector sensor.

Properties of the Acoustic Vector Field near the Underwater Planar Cavity Baffle and Its Application

“…Barton et al [9] calculated the acoustic pressure distribution near the rigid spheroid with an arbitrary incident acoustic field. Ji et al [10] discussed the influences of the prolate spheroidal baffle on the directivity of an acoustic vector hydrophone. Roumeliotis et al [11] calculated the sound diffraction of a plane wave from an impenetrable, soft or hard, and prolate or oblate spheroid.…”