Some TV commercials are about to get even quieter. Back in 2011, Congress passed a law requiring that commercials arent broadcast any louder than the TV shows airing around them, and now the FCC is making some minor adjustments thatll help to better enforce that. Since the beginning of the rules enforcement in late 2012, a commercials loudness has been determined by its average volume — but beginning next June, thatll change. [The new algorithm] is intended to more accurately reflect consumer perceptions in situations in which the commercial contains both very loud and very quiet passages, the FCC writes in a Federal Register filing.