The "CALM" Act, which protects viewers from excessively loud TV commercials, went into effect Thursday.
"CALM" stands for Commercial Advertisement Loudness Mitigation.
The new volume control law puts an end to loud commercials by requiring them to be within two decibels of regular programming. The act ensures that commercials aren't louder than the TV program content they accompany.
The Federal Communications Commission adopted the rules on Dec. 13, 2011, but gave the industry a one-year grace period to adopt them.