The U.S. House of Representatives, in a voice vote on the floor, has passed the Commercial Advertisement Loudness Mitigation Act (HR 1084) and sent it to the Senate. The bill would require the FCC to create a loudness standard preventing broadcast commercials from being louder than the program material into which they are inserted. Several other countries, including the United Kingdom, Australia, Brazil, France and Russia, have already established such legal standards.
http://broadcastengineering.com/audio/archive/us-house-votes-for-calm-122209/