Historically, the biggest complaint received at television stations is that the commercials are too loud. Of course, you could eliminate commercials altogether with a TiVo or other PVR. But if you're not into that, don't care about destroying the dynamic range of the audio on television shows you're watching, or have no idea what the term "dynamic range" means, the $49.95 TV Volume Regulator is for you.
Connect this mundane-looking device, and it immediately begins doing its work, subtly lowering unusually loud segments that you're watching, bringing their volume down to a level more closely matching that which came before. It has a quick reaction time, .002 seconds, so it will probably shut up that screaming car commercial announcer before you know it.
This might not be the best solution if you like your movie explosions jarring, frightening, and unpleasant. But then, you probably know what "dynamic range" means, too.