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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 Distortionmeter ： ウィキペディア英語版 Distortionmeter Distortionmeter (or more precisely distortion factor meter) is an electronic measuring instrument which displays the amount of distortion added to the original signal by an electronic circuit. == Harmonic distortion == Harmonic distortion is equivalent to adding harmonics to a signal. When a purely sinusoidal signal is distorted, a series of harmonics is superimposed on the original signal. If the input is :$=a\_1\; \backslash cdot\; sin(\backslash omega\; t)$ The normalized output is :$=a\_1\; \backslash cdot\; sin(\backslash omega\; t)+a\_2\; \backslash cdot\; sin(2\; \backslash omega\; t)+a\_3\; \backslash cdot\; sin(3\; \backslash omega\; t)+..$ The Total harmonics distortion (THD) is defined as the ratio of the harmonics to the fundamental; 〔Reference data for Radio Engineers, Howard W.Sams & co.ITT, ISBN 0-672-21218-8, p.18-12〕 i.e., $THD\; =\; \backslash frac\{\backslash sqrt\{a\_1\}$ This ratio can be given in dB or in percentage. 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「Distortionmeter」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.