出典:Wikipedia
出典:『Wikipedia』 (2011/02/18 06:40 UTC 版)
Total Harmonic Distortion (THD) Analyzers calculate the total distortion introduced by all the harmonics of the fundamental frequency wave. In most cases THD is the amount required to be calculated, rather than distortion caused by individual harmonics. This type of analysis is very important in systems (e.g. Audio) in which filters with extremely small passband/ stopband are desired, such as a notch filter in a parametric equalizer.