Sound physical property matching between non central listening point and central listening point for NHK 22.2 system reproduction

Abstract

NHK has proposed a famous 3D audio system: 22.2 multi-channel system, but its loudspeakers are too many and are troublesome to put in home. Ando and Wang has proposed two simplification methods to reduce its channel number, but only 3D sound field at the central listening point can be recovered well by NHK 22.2 system and its simplified systems, the listening experience at a non central listening point is worse than that at the central listening point. In real life, listeners may stay at arbitrary listening point: central or non central point. Conventional pressure matching and particle matching method could be used for non central zone sound field reproduction, but they have some theoretical shortcomings. To address these problems, this paper propose a universal non central listening point sound field reproduction method by matching sound physical property between a non central listening point and the central listening point. Subjective and objective experiments show the effectiveness of the proposed method.