Commercials have been at a higher volume than the regular tv....
Back in the days of VCR's they had a 'gadget' to edit commercials while you were recording and you didn't have to do it manually... It monitored the sound on the recording and when it detected the volume go up, it would pause the recording until the sound went down to the 'regular' sound...
It worked most of the time, but if there was a loud part in a movie, sometimes it would pause it during that part where the volume increased...
Not to mention that the advertisors want you to hear their ads so they make them louder than the rest of the broadcast so you hear it better... Subliminal advertising....
