Title: Direct sound field separation method on holography surface

Author(s): MAO Jin; XU Zhongming; LI Shu; HE Yansong; ZHANG Zhifei;

Affiliation(s): State Key Laboratory of Mechanical Transmission, Chongqing University, et al.

Abstract: In order to simplify the process which aims at separating the coherent sources located at different sides of holography surface,a direct sound field separation method which only depends on the data of holography surface is proposed.Assume that the reconstruction surface is holography surface,according to the equivalent sources located at the spherical surface,there exists a relationship between the measured sound pressure and the calculated value based on equivalent source method.Then,the coherent sources are separated.Numerical simulation analyzes the separation results when the interference sources are pulsating ball source and simply supported steel sheet with forced oscillation,respectively.The separation method is validated by experiment with two loudspeakers.The results show that the proposed method has high accuracy to the two kinds of interference sources and high tolerate deviation.