Multipoint adaptive equalizer control method and a multipoint adaptive equalization control system

摘要

PROBLEM TO BE SOLVED: To provide a multipoint adaptive equalization control method and a multipoint adaptive equalization control system, which perform adaptive equalization control of observation sounds in a plurality of control points in a vehicle.;SOLUTION: A phase characteristic which is reverse to a phase characteristic from a speaker to a main control point, is imparted to an audio signal which is output from an audio source. An error signal which is a difference between the observation signal in each observation point of the audio signal which is outputted from the speaker, and a target signal in each control point, is inputted. A gain of the audio signal is determined by performing adaptive signal processing so that the sum of powers of respective error signals become the minimum, the reverse phase characteristic and the gain are imparted to the audio signal, and the resultant audio signal is inputted to the speaker.;COPYRIGHT: (C)2011,JPO&INPIT