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单词 harmonic distortion
释义
harmonic distortion

Electronics and Electrical Engineering
  • The distortion of a waveform caused by the nonlinear effect of a system or component that creates harmonic frequencies that would not otherwise be present at the output. The extent to which a particular harmonic component distorts a signal is given by the ratio of its amplitude An to the amplitude of the fundamental component Af, expressed as a percentage:

    %age nthharmonicdistortion=%Dn =(AnAf)×100%

    The total harmonic distortion (THD) is the square root of the sum of the squares of all the individual harmonic distortions:

    %THD=(D22+D32++Dn2)×100%

    where the individual harmonic distortion Dn is specified by the ratio An/Af.


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