| 释义 |
microgroove|ˈmaɪkrəʊgruːv|
[f. micro- 1 + groove n.]
A very narrow groove on a gramophone record; a record having such grooves. Freq. attrib.
1948Amer. Speech XXIII. 252 CBS announces a new-type record—microgroove. 1948Electronic Engin. XX. 333/3 The groove size, from which the name ‘Microgroove’ has been derived, is only 0·0027 in. to 0·003 in. 1949Wireless World Apr. 146/1 What is a ‘microgroove’ record? It is a name given to the 7-, 10- or 12-in pressings in high⁓grade vinylite, with a rotational speed of 331/3 r.p.m... As it was found necessary to reduce the groove width to about one-third the size of normal record grooves, the name ‘Microgroove’ was coined originally by Columbia Records, Inc., for their 331/3 r.p.m. records, but it would now appear to be used in America as a generic term for all such fine-pitch records. 1951Sackville-West & Shawe-Taylor Record Guide 715 They increased the playing time of each side by..a much narrower groove⁓cut known as ‘microgroove’. Ibid. 717 Even a 7-inch 331/3 microgroove would apparently be too long—or too expensive—to meet this case. 1957Times 13 Dec. 18/2 The 78 r.p.m. record began to lose favour. On the other hand, the demand for microgroove records continued strongly and sales of both 45 r.p.m. and 331/3 r.p.m. records increased. 1958Times 13 Sept. 9/1 This old Weingartner set has now reappeared..skilfully transferred to LP microgroove by Pathé-Marconi's engineers. 1972Jazz & Blues Nov. 35/2 Some microgroove reissues contain edited versions of these titles. |