Patent ID: 7068799

Claim:
A sound field correcting method in an audio system, for supplying audio signals to a plurality of first sound generating means having a first reproducing frequency band and a second reproducing frequency band and a second sound generating means having the second reproducing frequency band, said correcting method comprising: a first step of supplying a noise simultaneously to said plurality of first sound generating means and then detecting a reproduced sound in the first reproducing frequency band that is reproduced by said plurality of first sound generating means; a second step of supplying the noise simultaneously to said plurality of first sound generating means and then detecting a reproduced sound in the second reproducing frequency band that is reproduced by said plurality of first sound generating means; a third step of supplying the noise to said second sound generating means and then detecting the reproduced sound in the second reproducing frequency band; a fourth step of performing phase characteristic correction on the audio signals supplied to said plurality of first sound generating means and said second sound generating means; and, thereafter a fifth step of adjusting levels of the audio signals supplied to said plurality of first sound generating means and said second sound generating means such that a sum of a spectrum average level of the reproduced sound in the second reproducing frequency band reproduced by said plurality of first sound generating means and detected by the second step and a spectrum average level of the reproduced sound in the second reproducing frequency band reproduced by said second sound generating means and detected by the third step and a spectrum average level of the reproduced sound in the first reproducing frequency band detected by the first step are set equal to a ratio of predetermined target characteristics.