The TV station isn’t turning up the volume when the commercials run, but that’s not the complete answer. Otherwise, you wouldn’t need to reach for the remote to turn down the volume during the commercial break.

A TV program has a mix of audio levels. There are loud parts and soft parts. Nuance is used to increase the dramatic effect.

Blame advertisers! Most advertisers don’t want nuance. They want to grab your attention. To do that, the audio track is electronically processed to make every part of it as loud as possible within legal limits.