We had a tv that when commercials came on it automatically lowered the volume. I was an option in the settings menu. Can't remember what kind of tv but Tommy Smothers was in the ad for it. Loved that feature. They either got rid of that feature or the commercial people found a way to get around it. Commercials have always been louder; some now are uuuber loud. I don't give a shit the why of it, I just mute the thing or lower the volume . . . but mostly I just change the channel. I had one remote that had commercial skip . . . you set a timer for say 3 minutes on the channel you are watching then bop around and at the end of the 3 minutes the tv went back to your original channel. Yeah, that feature doesn't exist anymore either.
Yes, we too bought a tv that moderated the Commercial and Program volume as well, but it DOES NOT WORK if you have DISH or Direct TV....their cable box OVERRIDES what we payed for.... if it were a moderate volume rise...so be it, but it is grossly and obnoxiously much louder now for commercials.
These companies should listen to their customers and are doing a disservice to their advertisers by increasing the noise decimal so much that everyone is muting their tv's or channel surfing when commercials are on.