| 单词 | warble tone |
| 释义 | > as lemmaswarble tone warble tone n. Physics a constant amplitude tone whose frequency is cyclically varied between certain limits, used in acoustic measurement to avoid irregularities associated with the use of single frequencies. ΘΚΠ the world > matter > physics > science of sound > vibration > [noun] > simple tone > with cyclical variance warble tone1933 1933 Proc. IRE 21 1183 The introduction of a ‘warble tone’ into the technique of acoustical measurements..has also supplied a growing interest in this kind of oscillation. 1958 H. J. Gray Dict. Physics 527/1 A warble tone can be produced from an oscillator by rotating a small variable condenser in the tuned circuit at a constant speed. 1971 B. J. Smith Acoustics v. 96 To attempt to eliminate the variations due to room modes for each frequency a band of noise is used, either in the form of white noise or in warble tones. < as lemmas |
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