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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク RCA Type 77-DX microphone ： ウィキペディア英語版 RCA Type 77-DX microphone The RCA Type 77-DX microphone is a poly-directional ribbon microphone, or pressure-gradient microphone, introduced by the RCA Corporation in 1954. Both it and its predecessor, the Type 77-D, are listed in RCA's 1955 catalog, and the 77-DX appears as late as 1967. Its design has inspired a stereotypical microphone icon. Throughout the 1950s and 1960s, phonograph record album cover photos show artists singing into the side of a 77-DX. ==Controls== The directionality of the 77-DX is variable. A rotating backshutter on the acoustic labyrinth, controlled by a screwdriver-operated slot at the rear of the microphone, allows the user to vary the microphone's pattern from omnidirectional in the fully closed position, to cardioid, to figure-8 (bidirectional) in the fully open position. A 3-position switch at the bottom end of the microphone allows the user to control the desired amount of low-frequency rolloff . 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「RCA Type 77-DX microphone」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.