public address system
noun/ˌpʌblɪk əˈdres sɪstəm/
/ˌpʌblɪk əˈdres sɪstəm/
(abbreviation PA system
/ˌpiː ˈeɪ sɪstəm/
/ˌpiː ˈeɪ sɪstəm/
, PA)- an electronic system that uses microphones and loudspeakers to make music, voices, etc. louder so that they can be heard by everyone in a particular place or building
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public address system