[chacha102]

Why only complain about something when you remember to press a button?

At some point, someone is just going to hook up a decibel meter and automatically press the button when it hits a threshold. It might file a couple of bad complaints, but if the noise difference is significant, you could definitely increase your throughput.

[sgustard]

My neighborhood has car alarms which serve a similar function (to warn of excessive noise or vibration by emitting louder noise.)