Intermodulation distortion

Japanese: intermodulation distortion（英語表記）intermodulationdistortion

...Because it can reduce the change in signal level, it is used for automatic volume control, and is also used as part of a compander that reduces noise in a system by putting it at the input of a transmission or recording system and putting an expander with the inverse characteristic at the output side. Intermodulation distortionWhen multiple sine waves with different frequencies are input, many frequency components that are related to the sum and difference of these frequencies are generated in the output. This distortion component is called intermodulation distortion, and it is a harmful cause of deterioration in sound quality.

*Some of the terms that refer to "intermodulation distortion" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…信号のレベル変化を小さくできるので，自動音量調整に用いられたり，伝送系や記録系の入力に入れ，出力側にこれの逆特性をもつエクスパンダーを入れて，系の雑音低減を図るコンパンダーの一部としても使用される。　混変調ひずみintermodulation distortion周波数が異なる複数の正弦波を入力したとき，出力にこれらの周波数の和と差の関係をもつ多くの周波数成分が発生する。このひずみ成分を混変調ひずみといい，音質を損ねる有害な原因となる。…

※「intermodulation distortion」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典第２版について | 情報

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