| 摘要 |
PURPOSE:To operate speakers change over automatically following to the movement of listeners, by arranging a plurality of speakers in a resident area. CONSTITUTION:When the listener moves from a main listening space 1 to another space A, a sensor SA detects it and outputs a detection signal to a switch 5a. Then, the switch 5a is turned on and an output is applied from an amplifier 3 to a spealer 4a. When the listener moves from the space A to the space B, a switch 5b is turned on, the switch 5a is restored to the off-position, and the speaker 4a in the space A is stopped. When the listener moves spaces C, D, speakers 4c, 4d are similarly operated. That is, the listener moves from the listening space 1 to the spaces A, B..., then the speakers 4a, 4b... of the spaces A, B... are operated, allowing to listen programs such as news without interruption, and to stop the speakers of the space without the listener. |
