AUTOMATIC SOUND FIELD CORRECTION SYSTEM AND SOUND FIELD CORRECTION METHOD

摘要

PROBLEM TO BE SOLVED: To realize a sound field space with high quality. SOLUTION: A filter coefficient of a graphic equalizer GEQ is corrected and an attenuation rate of inter-channel attenuators ATG1-ATG5 is corrected on the basis of the result of detection of the reproduced sound produced by supplying a noise to full band loudspeakers 6FL-6RR and a woofer 6WF through the graphic equalizer GEQ. A delay in delay circuits DLY1-DLYk is corrected on the basis of the result of detection of the sound produced by supplying noise to the loudspeakers 6FL-6WF through the graphic equalizer GEQ. An attenuation rate of an inter-channel attenuator ATGk is corrected on the basis of the results of detection of the reproduced sound so that the levels of the sounds reproduced by the loudspeakers 6FL-6FW are made flat in the audio frequency band.