| 单词 | public address system |
| 释义 | > as lemmaspublic address system attributive. Designating equipment used to project speech or music to an audience, esp. in a large building or at an outdoor gathering (abbreviated P.A.); esp. in public address equipment, public address system. ΘΚΠ the world > physical sensation > hearing and noise > audibility > sound magnification or reproduction > [noun] > public address system public address system1917 Tannoy1928 squawk box1945 1917 East St Louis (Illinois) Jrnl. 5 Aug. 10/6 (advt.) Public address system for sale, cheap. 1925 Oakland (Calif.) Tribune 1 Feb. m6/2 In the apartment house project, the Public Address equipment provides sufficient amplification. 1950 Engineering 24 Nov. 392/2 Public-address equipment using magnetic tapes for announcing and recording..has been installed. 1978 R. V. Jones Most Secret War xxi. 176 The effect would be rather like that which occurs in public address systems where the noise from the loudspeakers impinges on the original microphone. 1991 Amer. Square Dance July 17/1 Public address equipment with its turntables and speakers is heavy to handle. 1994 Amer. Spectator Sept. 18/2 A second-tier National Security Council official..has commandeered the public address microphone and is ‘briefing’ the captive audience. < as lemmas |
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