| 摘要 |
PURPOSE:To attain accurate sound field correction by the operation that a reference signal is generated again after an equalizer, absorbing the signal and completing the operation when a variation on a frequency axis is smaller than a certain value and resetting the equalizer when larger. CONSTITUTION:A narrow band signal of each band is oscillated, its level is fetched, level adjusting devices 21-2n at each band are set by its complement and then the narrow band signal of each band is oscillated again, its level is fetched so as to check the variation in the level of each band. When the variation is small, the operation is finished and when the variation is large, the level adjusting devices 21-2n are reset based on the level information. Thus, the effect such as mutual interference of band-pass filters 11-1n is eliminated thereby conducting accurate sound field correction. |
