Monday, June 04, 2007
In recent years, record companies have been increasing the overall volume of commercial albums (particularly rock music and pop music) by using higher and higher degrees of compression during mastering, sometimes impacting sound quality (this may even include "hard clipping"). This phenomenon has been referred to as the "loudness war".
Most television commercials are compressed heavily (typically to a dynamic range of no more than 3dB) in order to achieve near-maximum perceived loudness while staying within permissible limits.
[read the article - via timesonline.co.uk]
[Why records are getting louder - via musicthing]