The subsonic remote control lamp switch circuit (1)

Published:2011/7/5 1:49:00 Author:zj | Keyword: The subsonic, remote control, lamp switch circuit | From:SeekIC

As shown, the remote control light uses 18kHz acoustic wave as remote control signal. The auditory range is from 20Hz to 20kHz. Ear inaudible ultrasonic is more than 20kHz. Although 18kHz wave is in audible sound wave range, it is in the audible sound wave end edge and is close to the lowest frequency. And human ear will not be sensitive. You can only hear the sound Ci Ci . So we call it The ultrasonic.



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