| 单词 | frequency spectrum |
| 释义 | > as lemmasfrequency spectrum frequency spectrum n. the entire range of frequencies of electromagnetic waves, sound waves, etc.; also, the distribution of the energy of a wave-form among its different Fourier components. ΘΚΠ society > communication > telecommunication > [noun] > signal > frequency or band of frequencies high frequency1842 low frequency1900 voice frequency1905 audio frequency1913 pulsatance1919 medium frequency1920 side frequency1920 intermediate frequency1924 bass1930 frequency1943 frequency spectrum1955 1955 F. E. Terman et al. Electronic & Radio Engin. (ed. 4) xvii. 591 When the instantaneous frequency of a frequency-modulated wave is varied in a more complex manner..the frequency spectrum becomes very complicated. 1962 Rep. Comm. Broadcasting 1960 5 in Parl. Papers 1961–2 (Cmnd. 1753) X. 259 The division by international agreement of the frequency spectrum into bands allocated to particular services forms part of the International Radio Regulations. 1962 A. Nisbett Technique Sound Studio 269 Scale, division of the audio frequency spectrum by musical intervals (i.e. frequency ratios). 1968 C. W. McMullen Commun. Theory Princ. i. 10 The shape and dimensions of the pulse signal determine the frequency spectrum. < as lemmas |
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