| 摘要 |
PURPOSE:To facilitate the adjustment of the parameter of respective speakers by calculating the adjustment quantity of the parameter of respective speakers from a signal collecting voice signals generated from plural speakers through a microphone. CONSTITUTION:When the impulse signal of a sound volume A0 is generated from a speaker 1 for example, the signal of a sound volume A FR is received by a microphone 17 after a delaying time D FR, converted into a digital signal with an AD converter 19 and sent to a delaying quantity and sound volume detection circuit 21. The delaying quantity and sound volume detection circuit 21 detects the delaying quantity D FR and the sound volume A FR. Similarly, other speakers are detected, the delaying quantity and sound volume detection circuit 21 sets the sound volume so that respective sound volumes may have an adequate sound volume distribution, each delaying quantity and an adequate delaying quantity are compared, the delaying quantity of the respective speakers is set and sent to delaying circuit and amplifiers 9, 11, 13 and 15. Thus, the adjustment of the sound volume and the delaying quantity of respective speakers 1, 3, 5 and 7 can be automatically executed. |
