Automatic Volume Control
Automatic Volume Controller or Electronic Sound Level Attenuation System (for use in DJ / Music Playback systems)
A unit which is connected between the mixer or sound source, a karaoke machine or CD player for example, and the main power amplifier. The unit continually monitors the sound level and reduces the volume if a preset limit is exceeded. This type of noise control system is only suitable if the sound system or at least the power amplifier is permanently installed in the venue.