acoustic intercom

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• loudspeaker system — noun electro acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance • Syn: ↑loudspeaker, ↑speaker, ↑speaker unit, ↑speaker system • Hypernyms: ↑electro acoustic transducer • Hyponyms …   Useful english dictionary

• speaker system — noun electro acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance • Syn: ↑loudspeaker, ↑speaker, ↑speaker unit, ↑loudspeaker system • Hypernyms: ↑electro acoustic transducer • Hyponym …   Useful english dictionary

• speaker unit — noun electro acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance • Syn: ↑loudspeaker, ↑speaker, ↑loudspeaker system, ↑speaker system • Hypernyms: ↑electro acoustic transducer • Hyp …   Useful english dictionary