| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the anxiety caused by the reproduced sound of acoustic sources of other seats by providing a masking means which outputs noise from a speaker. SOLUTION: The switch which selects acoustic sources, is provided for every seat. If the performance of a CD is selected in a seat A and no musical performance is reproduced in a seat B, a speaker 5 outputs the reproduction of the CD because a CD reproducing is selected by a switch 3 in the seat A. Therefore, the CD reproduction sound from the speaker 5 leaks to the seat B. Since no musical performance is reproduced in the seat B, a selection switch 6 selects a microphone 1. Thus, the vehicular running noise collected by the microphone 1 is amplified by an amplifier 7 and reproduced by a speaker 8 of the seat B. As a result, the reproduced sound of the CD from the speaker 5 of the seat A is masked by the vehicular running noise from the speaker 8 and the sound from the seat A does not trouble the passenger in the seat B. |
