That sounds like a great microcontroller/decibel meter project, something that could run 24 hours a day unattended.

One problem is the risk of false positives messing up the "training"

	▲	sejje 3 hours ago \| parent [-]
		What's the risk? You turn on the TV when it was off? And then detect the noise and turn it back off?

That's actually where I thought the article was heading