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单词 sq
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SQ
SQ n. [ < stereophonic-quadraphonic] a designation (proprietary in the U.S.) of audio equipment used with reference to a system of quadraphonic recording and reproduction.
ΚΠ
1971 B. Bauer et al. in Jrnl. Audio Engin. Soc. 19 639/1 We..‘encode’ (combine) the four channels into two by using a special ‘matrix’, or linear additive circuit.., which we called the SQ (for stereophonic-quadraphonic) matrix encoder.
1973 Official Gaz. (U.S. Patent Office) 20 Nov. tm138/2 Columbia Broadcasting System, Inc., New York, N.Y. Filed Dec. 6, 1971... The mark represents the stylized lettering ‘SQ’. For pre-recorded phonograph records, and pre-recorded tapes... First use June 10, 1971.
1976 Listener 23 Dec. 846/1 Discs in compatible quadraphonic/stereo pressings utilising the SQ system.
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