| 释义 |
intermodulation Electr. Engin.|ˌɪntəmɒdjuːˈleɪʃən|
[f. inter- 2 a + modulation.]
Modulation of the sinusoidal components of a signal or wave-form by one another, a kind of distortion that produces new components with frequencies equal to the sums and differences of those already present. Freq. attrib., esp. in intermodulation distortion.
1931Inst. Radio Engin. Year Bk. 50 Intermodulation is the production, in a non-linear circuit element, of frequencies corresponding to the sums and differences of the fundamentals and harmonies of two or more frequencies which are transmitted to that element. 1940Chambers's Techn. Dict. 454/1 Intermodulation distortion. 1950K. Henney Radio Engin. Handbk. (ed. 4) xvii. 854 These frequencies resulting from intermodulation are generally inharmonic or discordant and also likely to fall in the middle or upper portion of the audio range, both of which conditions make them quite objectionable. 1958Engineering 31 Jan. 160/2 If two musical tones are applied, both appear at the output with all their combination tones (intermodulation products). 1964R. F. Ficchi Electr. Interference iii. 24 The mixing of at least two signals in a nonlinear device which causes intermodulation distortion and results in the generation of harmonics should not be permitted. 1971Sci. Amer. Sept. 178/1 (Advt.), That's 250 watts..over the whole power-pushin' listening range. Right through from 20 Hz to 20,000 kHz [sic] with total harmonic and intermodulation distortion at less than 0·1%! |