| 摘要 |
PURPOSE:To obtain natural sound field, by inserting a delay circuit for correcting the difference of the distance from a receiving point to left and right speakers and a sound volume adjusting circuit for correcting the difference of sound strength to a signal circuit of the speakers in order to set the image in the center of right and left speakers when listening at asymmetrical position. CONSTITUTION:A delay circuit 26 for correcting the delay of sound propagation due to the difference of the distance from a listening point to a left speaker and right speaker is provided to a signal circuit which inputs a right channel signal out of a right channel input terminal Ri. An output corrected its propagation time due to the difference of the distance to the listening point by the circuit 26 is supplied to a sound volume adjuster 24 to correct the sound strength of the left and right speakers. A left channel signal out of a left channel input terminal Li is inputted to a left speaker 10 via a driving amplifier 22. A right channel signal corrected its sound propagation delay and sound strength by the circuit 26 and sound volume adjuster 24 is supplied to a right speaker 12 via a driving amplifier 20 so that the outputs of the amplifiers 20 and 22 become nearly equal, and the sound image comes to the center of the speakers 10 and 12. |
