Acoustic vector characteristics of near fields scattered by a spherical shell baffle

Here,acoustic vector characteristics of near fields scattered by a spherical shell baffle were investigated.The analytic expressions for the scattered sound pressure and particle vibrating velocity were derived using the elastic thin shell theory.Calculations were presented for the sound pressure,the particle velocity and the sound intensity of the scattered near fields.It was found that the pressure and the sound particle velocity fields near the surface of the spherical shell baffle are characterized by complex interference structures,particle velocity directions and the sound source bearings are not consistent,the phase difference between pressure and particle velocity is not zero,the sound intensity vector does not reflect the sound source bearings.These results provided a basis for application of acoustic vector sensors on board.