| 单词 | vu meter |
| 释义 | > as lemmasVU meter VU n. (also vu) [probably abbreviation of volume unit : compare quots. for this s.v. volume unit n. at volume n. Compounds 2, where it is implied to be so] Electronics a unit in which some types of volume indicator are calibrated, a sine wave with a power of 1 mW being assigned the reference value of 0 VU (see quot. 1940 and cf. volume indicator n. at volume n. Compounds 2); frequently attributive, esp. in VU meter, any volume indicator employing the VU scale. ΘΚΠ the world > matter > physics > science of sound > [noun] > instrument for measuring volume volume indicator1923 VU meter1940 the world > matter > physics > science of sound > [noun] > instrument for measuring volume > unit of calibration volume unit1940 VU1940 1940 H. A. Chinn et al. in Proc. IRE 28 14/2 It was thought..that there would be less confusion in adopting the new standards if a new name were coined for expressing the measurements. The term selected is ‘vu’, the number of vu being numerically the same as the number of decibels above or below the new reference~volume level. 1944 H. A. Chinn et al. in Proc. IRE 32 601/1 A key located to the left of the VU meter should be used. 1959 K. Henney Radio Engin. Handbk. (ed. 5) xiii. 19 The A scale emphasizes the VU markings and has an inconspicuous voltage scale. 1976 Canad. Jrnl. Linguistics 21 70 The speaker made every attempt to maintain equal intensity across syllables by monitoring his output on a VU meter. < as lemmas |
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