| 摘要 |
PURPOSE:To provide a sound field control system capable of generating an effect sound without generating an abnormal sound even when a sound whose high and medium sounds are raised rapidly, is inputted. CONSTITUTION:An input signal S whose part or the whole of the vicinity of 1kHz-10kHz are taken out by the band cut of a band-pass filter 10, ands further, are integrated by a level detection circuit 20, and are differentiated by a level difference detection circuit 30 to become a signal C, and the sound whose high and medium sounds are raised rapidly, is detected. On the other hand, though the input signal S is delayed by a delay line 50 and multiplied by a gain 60 to be inputted to an effect sound generation part 70, by a control part 40 is a part to control the gain 60 according to the signal C, and when such a detection is performed, by cutting or attenuating the input to the effect sound generation part for several ms to several tens ms, the occurrence of the abnormal sound is prevented. |
