翻訳と辞書 Words near each other ・ Noise reduction coefficient ・ Noise regulation ・ Noise rock ・ Noise shaping ・ Noise spectral density ・ Noise temperature ・ Noise trader ・ Noise Unit ・ Noise Viola ・ Noise Viola (album) ・ Noise vs. Beauty ・ Noise weighting ・ Noise Won't Stop ・ Noise, vibration, and harshness ・ Noise-based logic ・ Noise-canceling microphone ・ Noise-cancelling headphones ・ Noise-Domain Reflectometry ・ Noise-equivalent flux density ・ Noise-equivalent power ・ Noise-equivalent target ・ Noise-equivalent temperature ・ Noise-figure meter ・ Noise-immune cavity-enhanced optical heterodyne molecular spectroscopy ・ Noise-induced hearing loss ・ Noise-predictive maximum-likelihood detection ・ Noiseau ・ Noisebox Records ・ Noisebridge ・ Noisecore Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Noise-canceling microphone ： ウィキペディア英語版 Noise-canceling microphone A noise-canceling microphone is a microphone that is designed to filter ambient noise from the desired sound, which is especially useful in noisy environments. ==Technical detail== The development is a special case of the differential microphone topology most commonly used to achieve directionality. All such microphones have at least two ports through which sound enters; a front port normally oriented toward the desired sound and another port that's more distant. The microphone's diaphragm is placed between the two ports; sound arriving from an ambient sound field reaches both ports more or less equally. Sound that's much closer to the front port than to the rear will make more of a pressure gradient between the front and back of the diaphragm, causing it to move more. The microphone's proximity effect is adjusted so that flat frequency response is achieved for sound sources very close to the front of the mic – typically 1 to 3 cm. Sounds arriving from other angles are subject to steep midrange and bass rolloff. Commercially and militarily useful noise-canceling microphones have been made since the 1940s by Roanwell,〔http://www.roanwellheadsets.com/mics.html 〕 Electro-Voice and others. 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「Noise-canceling 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.