VU meter

Japanese: VU meter(英語表記)VUmeter
VU meter

… beat: A periodic change in amplitude that occurs when two sine waves with slightly different frequencies are superimposed. It is called a beat and can be heard in the audible range as a sound with a frequency that is the difference between the two frequencies. VU meter: An indicator for monitoring the level of a program sound, with characteristics close to the mean squared type so that it indicates a level close to the audible volume. It has a gentler rise than a peak program meter, and when a step signal is applied, it takes about 300 ms to reach 99% of the indicated value. …

*Some of the terminology that mentions "VU meter" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… ビートbeat周波数がわずかに異なる二つの正弦波が重ね合わされたときに生ずる振幅の周期的変化で,うなりといって可聴帯域では二つの周波数の差の周波数の音として聞こえる。 VUメーターVU meterプログラム音のレベルを監視するための指示計器であり,聴感上の音量に近い指示をするように平均2乗形に近い特性をもつ。ピークプログラムメーターに比し緩やかな立上りを示し,ステップ状の信号を加えたときに99%の指示値までに達する時間を約300m秒に規定している。…

※「VU meter」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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