| 释义 |
loud-speaker|laʊdˈspiːkə(r)|
Also loud speaker, loudspeaker.
[f. loud a. + speaker.]
1. Any instrument for converting variations in an applied electric current or voltage (of appropriate magnitude and frequency) into corresponding sound waves that are able to be heard at a distance from the instrument.
loud-speaking (see next) was formerly the usual term employed to refer to such instruments. Quot. 1884 is an isolated early example of loud-speaker.
1884English Mechanic 26 Sept. 95/3 Before troubling to make or buy a ‘loud speaker’, ‘Pathologist’ might try the following dodge... Fix an ordinary ‘toy’ telephone over one ear... Fasten the end of the string from the ‘toy’ to the centre of the diaphragm of the Bell..and, at the middle of the string, hang a small weight..to keep it taut... The voice is almost..as clear as when using the Bell direct. 1920Telegraph & Telephone Jrnl. VI. 111/2 It was quite remarkable how far and how distinctly it was possible to hear the talk from the loud-speakers. 1923Daily Mail 1 Mar. 9 For each concert there will be seating accommodation..for 1,000 people, and to these the concert will be delivered by powerful loud speakers. 1924Wireless Weekly 8 Oct. 745/1 Loud speakers of all kinds are an outstanding feature of the show. 1930J. Buchan Castle Gay xiii. 208 Their ears were greeted by the bray of a loud-speaker to which the wives by their house-doors were listening. 1931B. Brown Talking Pict. v. 117 In some form or other the dynamic or moving coil loud speaker, well known in radio, is..always used for sound picture work. 1943J. B. Priestley Daylight on Saturday v. 27 They were now putting canned music over the loud speakers. 1957L. F. R. Williams State of Israel ix. 158 Regulations strictly forbid..loudspeakers in their [sc. the polling stations'] immediate vicinity. 1970J. Earl Tuners & Amplifiers iii. 76 Headphones..can nowadays give a subjective impression of quality, spaciousness and stereo effect equally as good as the best loudspeakers.
2. attrib., as loud-speaker enclosure, loud-speaker system, loud-speaker unit, loud-speaker van.
1962A. Nisbett Technique Sound Studio iv. 76 A manufacturer of *loudspeaker enclosures invited members of the public to judge and compare the quality of three different stereo speaker systems. 1971Daily Tel. (Colour Suppl.) 22 Oct. 57 (Advt.), Twin sealed loudspeaker enclosures, each containing 2 speakers (bass and treble).
1958Times Lit. Suppl. 10 Oct. 583/2 The installation of *loudspeaker systems in churches has rendered..manner even less important than matter in sermons than ever before. 1970J. Earl Tuners & Amplifiers i. 25 A loudspeaker system is a box, usually called enclosure or cabinet, carrying a socket or couple of terminals at the rear with a grille at the front through which the sound comes. Such a loudspeaker system is scientifically designed in conjunction with the loudspeaker units inside.
1925–6T. Eaton & Co. Catal. Fall & Winter 391 This *Loud Speaker Unit when attached to your gramophone tone arm, makes the horn act as a loud speaker. 1970Loud-speaker unit [see loud-speaker system above].
1945H. Nicolson Let. 3 July (1967) 474 One of my workers said something mean on the *loud-speaker van. 1973J. Drummond Bang! Bang! You're Dead! xlii. 144 A police loud⁓speaker van..pointed out that nothing could be gained by further resistance. |