| 单词 | notch filter | 
| 释义 | > as lemmasnotch filter   notch filter  n. Electronics a filter that attenuates signals within a very narrow band of frequencies. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > 			[noun]		 > filter > type of band-pass filter1922 slope filter1937 comb filter1941 state variable1942 noise filter1960 notch filter1962 1950    Electronics July 75/3 		(heading)	  				Notching filters.]			 1962    Electronic Technol. 39 332/1  				At v.h.f. it is desirable to construct notch filters from coaxial elements. 1988    V. Capel Audio & Hi-Fi Engineer's Pocket Bk. 120  				The inclusion of a 19kHz pilot-tone notch filter may slightly reduce the upper response. < as lemmas  | 
	
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