CALM stands for Commercial Advertisement Loudness Mitigation. The act is designed to prevent TV commercials from blaring at louder volumes than the program content they accompany. The rules govern broadcasters as well as cable and satellite operators.
The rules are meant to protect viewers from excessively loud commercials.
The Federal Communications Commission adopted the rules a year ago, but gave the industry a one-year grace period to adopt them.
9NEWS Technology and Operations Director Scott Gill talked about the regulation process and how it will affect TV.
"We put equipment in our air chain now that allows the levels to be constantly the same. So essentially we have an automated system that turns up or turns down the level so that they all match and are on the same pleasant level," Gill said.
Suspected violations can be reported by the public to the FCC on its website.
(KUSA-TV © 2012 Multimedia Holdings Corporation with The Associated Press)