| 摘要 |
PROBLEM TO BE SOLVED: To provide an on-vehicle audio device which can control sound in a front seat and a rear seat simultaneously.SOLUTION: In the on-vehicle audio device having speakers in a front door and a rear tray, enhancement of low-frequency in the front seat and improvement of unnatural sound field in the rear seat can be achieved simultaneously, by supplying the rear tray speaker with an output signal from a signal processing unit 21 comprising a low-frequency gain adjustment unit 12 for performing band division of an audio signal of a rear channel and adjusting a gain of a low-frequency component, a middle/high-frequency gain adjustment unit 13 for adjusting a gain of a middle/high-frequency component, a delay circuit 15 for giving a delay to the middle/high-frequency component, and an adder 14 for synthesizing the low-frequency component and the middle/high-frequency component having the gain and the delay adjusted to desired values. |
