public address system

1. is a type of: communication system - a system for communicating
   has:

   • amplifier - electronic equipment that increases strength of signals passing through it
   • loudspeaker, loudspeaker system, speaker, speaker system, speaker unit - electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
   • tannoy - a loudspeaker
   same as: p.a., p.a. system, pa, pa system

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