BoomBrush | Ripple Control Signal in Action - Audible detection @BoomBrush | Uploaded January 2015 | Updated October 2024, 1 hour ago.
I demonstrate the ripple control signal at 6am to turn the hot water off. Because the signal is a sine wave with distortion, a single phase motor will resonate to that distortion to the point where you can hear it with the human ear.