Analysis of information sources in references of the Wikipedia article "Total harmonic distortion" in English language version.
High-Order Harmonic Distortion (HOHD…) – A classic method for rub & buzz detection, HOHD uses the THD (Total Harmonic Distortion) ratio but only of harmonics above the 10th, 10-35, 20-200, etc., which is a simple way to account for frequency masking effects. … Rub & Buzz Loudness … Applies a psycho-acoustic loudness model to the residual signal to calculate the perceived level of the rub and buzz
%THD-F … ratio of the harmonic components … to the voltage … of the fundamental alone. … %THD-R … ratio of the harmonic components … to the total voltage … including the fundamental and all harmonics.
In the opinion of some, [THDF] exaggerates the harmonic problem. … [THDR] is used by the Canadian Standards Association and the IEC.
This number indicates the RMS voltage equivalent of total harmonic distortion power, as a percentage of the total output RMS voltage.
It has been shown that THDF is a much better measure of harmonics content. Employment of THDR in measurements may yield high errors in significant quantities such as power factor and distortion factor
Two equations exist to calculate the THD…
Two equations exist to calculate the THD…
HHD (higher harmonic distortion for harmonics from the 10th up to at most the 50th)
[Crossover distortion] may barely register on a distortion meter, so the figures looked excellent. Unfortunately … listeners could hear the distortion - it was plainly audible, and sounded dreadful.