Let me just clarify what that means in the electronic world. The "sound" isn't like you "hear" something with your ears. The "noise" is electrical noise that puts electrical spikes on the wires and those spikes can trigger certain kinds of electronic components. Noise on electrical lines is normally caused by bad connections, bad grounds, or faulty and/or failing components. Electrical noise can reduce the effectiveness of something to the point that it's totally useless.Triggered by sound? Interesting idea.