如今,许多楼道中都安装了声控灯。人们在夜晚进入漆黑的楼道,不用摸索墙上的开关,只要拍拍手或跺跺脚,灯就能自动亮起。这其中有什么奥妙吗?声控灯能听见“风吹草动”的声音,全靠电路里的“小话筒”——声传感器。它 Today, many corridors have sound-controlled lights installed. People enter the dark corridor at night without touching the wall switch, as long as the clap or shy, the light will automatically light up. Which of these subtleties? Sound control lights can hear the “wind and waves” sound, thanks to the circuit “small microphone ” - acoustic sensor. it