##  [Total Harmonic Distortion (THD)](/total-harmonic-distortion-thd) 

  ##  [Total Harmonic Distortion (THD)](https://information.quantumdictionary.io/total-harmonic-distortion-thd-0) 

  

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**Information & Communication Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A scalar metric that quantifies the aggregate power contained in harmonic frequency components (integer multiples of a fundamental frequency) generated by a device or system relative to the power in the fundamental component; commonly computed as the ratio (or root‑sum‑square ratio) of harmonic amplitudes/powers to the fundamental amplitude/power.