SOUND WAVE FIELD GENERATION

摘要

A system and method is configured to generate a sound wave field around a listening position in a target loudspeaker-room-microphone system in which a loudspeaker array of K≧1 groups of loudspeakers is disposed around the listening position, and a microphone array of M≧1 groups of microphones is disposed at the listening position. The system and method include equalizing filtering with controllable transfer functions in signal paths upstream of the K groups of loudspeakers. The system and method further include controlling with equalization control signals of the controllable transfer functions for equalizing filtering according to an adaptive control algorithm based on error signals and an input signal. The microphone array includes at least two first groups of microphones that are annularly disposed around a listener's head, around or in an artificial head or around or in a rigid sphere.

主权项

1. A system configured to generate a sound wave field around a listening position in a target loudspeaker-room-microphone system in which a loudspeaker array of at least one group of loudspeakers, with each group of loudspeakers having at least one loudspeaker, is disposed around the listening position, and a microphone array of at least one group of microphones, with each group of microphones having at least one microphone, is disposed at the listening position, the system comprising:
a plurality of equalizing filter modules that is arranged in signal paths upstream of the at least one group of loudspeakers and downstream of an input signal path and that have controllable transfer functions, and a plurality of filter control modules that is arranged in signal paths downstream of the groups of microphones and downstream of the input signal path and that control the transfer functions of the plurality of equalizing filter modules according to an adaptive control algorithm based on error signals from the at least one group of microphones and an input signal on the input signal path, wherein: the microphone array comprises at least two first groups of microphones that are annularly disposed around a listener's head, around or in an artificial head or around or in a rigid sphere.