[dmgbrn]

I lived with some guys who had a TV that would mute automatically during commercials. This was about 5 years ago, but I think the TV was older than that (it wasn't a flat screen).

I assume it took advantage of the fact that commercials have different audio signal properties (which we perceive as loudness) than regular programming.

I haven't seen a TV that can do this since, although the fact that I only use my TVs now for streaming and gaming means it's not exactly a feature that I'm on the lookout for.