My understanding is there are laws about maximum broadcast volume, at least in the U.S.
In general, it's not that the overall volume is louder on advertisements / talking, it's that the compression / limiting makes it seem louder. Music - even heavily compressed modern music - still needs some dynamics, so it generally feels quieter.
In general, it's not that the overall volume is louder on advertisements / talking, it's that the compression / limiting makes it seem louder. Music - even heavily compressed modern music - still needs some dynamics, so it generally feels quieter.
This is especially pronounced on television.