Direct sound field separation method on holography surface

In order to simplify the process which is to separate the coherent sources existed in different directions of holography surface, the method of direction sound field separation only depending the data on 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 based on equivalent source method between the measured sound pressure and calculated value. Then, the coherent sources will be separated. Numerical simulation analyzed the separation result when the interference sources are pulsating ball source and simply supported steel sheet with forced oscillation, respectively. The separation method is validated in experiment with two loudspeakers. The results show that this method has high accuracy to the two kinds of interference sources and has high tolerate deviation.