| 单词 | scratch filter |
| 释义 | > as lemmasscratch filter scratch filter n. a filter (filter n. 4d) designed to reduce the audibility of scratches and hiss in sound reproduction. ΘΚΠ society > communication > record > recording or reproducing sound or visual material > sound recording and reproduction > sound recording or reproducing equipment > [noun] > record-playing equipment > other parts sound-box1876 reproducer1883 scratch filter1929 spindle1940 groove-locating unit1941 reject button1947 1929 K. Henney Princ. Radio xvi. 289 Similar filters are used in phonograph reproduction to eliminate the needle noise. They are called scratch filters and may tune somewhere between 3000 and 5000 cycles. 1930 Sel. Gloss. Motion Picture Techncian (Acad. Motion Pictures, Hollywood) Scratch filter, a choke coil and condenser used to filter out very high frequency sounds or ground noises—usually the needle scratch in wax reproduction. 1931 B. Brown Talking Pictures 128 Usually, scratch filters are placed across the two pick-ups. 1935 A. R. Nilson & J. L. Hornung Pract. Radio Communication viii. 349 It will be necessary to attenuate the high frequencies... This may be accomplished by introducing a series-resonant circuit similar to that used for scratch filters. 1977 Rolling Stone 5 May 80/2 Watch for this spec when you consider the usefulness of rumble and scratch filters on your next amp or receiver. < as lemmas |
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