Method and device for automatic power off by sound detection circuit and sound detection circuit

摘要

The invention relates to a power supply automobile unit device, in particular to detect the sound in the telegram sent by a telecommunication or radio station, to automatically cut off the power supply, cut off the power supply and noise after judging the duration or end of the broadcast This is about the equipment and methods of prevention.;Therefore, identify the sound through the sound (sound) of the sound producing machine. If the power supply of the sound is not cut off automatically in a certain standard time period (about 5 minutes), The utility model has the effect of preventing power saving and noise, and can be used in the decoration of the TV or audio and other audio machines, which is very useful.