A method and system for audible realization of a virtual auditory environment based on loudspeaker array

Abstract

The invention discloses a loudspeaker array-based virtual acoustic environment auralization implementation method and system. The method comprises the steps that 1, a bounding volume hierarchy structure tree of a geometric model of a target environment is constructed; 2, sound field distribution of a sound source is calculated by means of the bounding volume hierarchy structure tree and the location of a given sound source; 3, room impulse responses from the sound source to target locations in the target environment are calculated according to the sound field distribution of the sound source;4, the room impulse responses obtained through calculation are converted into HOA coefficient vectors; 5, the HOA coefficient vectors are decoded according to the actual placing locations of loudspeakers in a replaying environment to obtain gains of the various loudspeakers, and the gains are called as multi-channel room impulse responses; and 6, the multi-channel room impulse responses obtained through decoding are convolved with any sound source signal to serve as signals of the loudspeakers to reconstruct a sound field of the sound signal at the target location. According to the method, replaying of a virtual acoustic environment in a non-standard playing environment is achieved.

Description

technical field [0001] The invention belongs to the technical field of spatial sound field playback, and relates to a virtual auditory environment audible system, in particular to a method and system for realizing a virtual auditory environment audible system based on an Ambisonics principle and a matching projection decoding algorithm. Background technique [0002] The research on room acoustics can be traced back to the early 20th century, and the research on room acoustics is mostly used to assist the design of architectural acoustics and achieve auralization. In recent years, with the development of computer technology, many modeling techniques have been developed in the field of room acoustics research, and their application fields are becoming more and more extensive, including the construction of virtual acoustic environments in the fields of computer games and cognitive research. A challenging task is to use the computational results of these models to asonify the ac...

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Problems solved by technology

However, on the one hand, the introduction of the regularization term will bring additional errors to the decoding. On the other hand, the selection of regularization coefficients generally depends on empirical selection by trial and error.

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