#public_address_system__PA_system__PA an electronic amplification system used as a communication system in public areas
supertype: communication_system__communicationsystem a system for communicating
part: amplifier electronic equipment that increases strength of signals passing through it
part: loudspeaker_system__loudspeakersystem__loudspeaker__speaker__speaker_unit__speakerunit__speaker_system__speakersystem electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
part: tannoy (British) a loudspeaker
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