| 摘要 |
PURPOSE: To reproduce a sound closer to the natural sound by providing separately lines through which a low frequency sound, a medium frequency sound and a high frequency sound are propagated and controlling optionally a lead/lag state of sounding in each line. CONSTITUTION: When an audio signal is given to an input terminal 4, a signal corresponding to a low frequency sound is given to a low sound frequency circuit 1, a signal corresponding to an intermediate frequency sound is given to an intermediate sound frequency circuit 2, and a signal corresponding to a high frequency sound is given to a high sound frequency circuit 3 respectively. The low frequency sound circuit 1 has a circuit to which a lead circuit comprising transformers T1 , T2 is connected in series and the signal is transmitted by an induced current, and the intermediate frequency sound circuit 2 and the high frequency sound circuit 3 employ capacitors C1 , C2 and a resistor R3 and the signal is transmitted faster than the circuit 1. The speed of signal transmission is adjusted by using delay circuits L1 , L2 for the intermediate frequency sound circuit and the high frequency sound circuit. The signal arisen at the same time is made faster for the intermediate frequency sound than the low frequency sound and for the high frequency sound more than the intermediate frequency sound and they are sounded simultaneously from the speaker. |
