Phase equalizer - isoutouki

Japanese: 位相等化器 - いそうとうかき
Phase equalizer - isoutouki

...Compensating for frequency and phase characteristics to flatten the overall characteristics is generally called equalizing, and the device that does this is called an equalizer. A speaker equalizer is a cone-shaped phase equalizer placed in front of the diaphragm of a horn speaker to align the phase of the sound emitted from the diaphragm and extend the playback frequency characteristics to high frequencies. In tape recording and playback, recording and playback of disk records, FM broadcasting, etc., recording and transmission are performed by changing the frequency characteristics to take into account distortion and noise based on the nature of the program sound and the characteristics of these systems. ...

*Some of the terminology that mentions "phase equalizer" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…一般に総合特性を平たんにするために,周波数特性や位相特性を補償することをイコライジングequalizing(等化)といい,その装置をイコライザーと呼ぶ。スピーカーのイコライザーとは振動板から放射される音の位相を合わせ,再生周波数特性を高域までのばすために,ホーンスピーカーの振動板の前におく円錐形状の位相等化器をいう。テープ録音再生やディスクレコードの録音再生,FM放送などでは,番組音の性質やこれらのシステムの特性から,ひずみや雑音を考慮して周波数特性を変えて録音や送出を行っている。…

※「位相等化器」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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