The sound energy in music in the 1-4khz range is 30-40db lower than bass, 15-30db than midrange.
Harmonics from bass make their way into midrange, harmonics from mid into the 1-4khz range.
Even if these harmonics are at a low level compared to the original tone, in the octave they intrude upon, they are loud (the ear is sensitive there and sound from music is at much lower levels.
A simple example is the 5th harmonic of 200hz is 1khz. In music, there is significantly more energy at 200hz than 1khz. Harmonics at relatively high levels make their way into lower treble and higher midrange sound energy in music.
0.1% harmonic distortion is totally unacceptable. Treble from 2-3khz up is just 0.1-1% the level of bass. 0.1% harmonics from bass are a HUGE problem to 0.1-1% treble in the signal. Even 0.01% THD is still 1% distorted treble. 0.1% THD is 10% distorted treble. Discuss.
(yes, these aren't exact numbers, but they're close enough to reality - a bigger problem than most think)
Mostly talking about odd order from cheap poorly designed solid state amplifiers with higher amounts of it (this sentence addressing a post using THD from a speaker as an example)
Harmonics from bass make their way into midrange, harmonics from mid into the 1-4khz range.
Even if these harmonics are at a low level compared to the original tone, in the octave they intrude upon, they are loud (the ear is sensitive there and sound from music is at much lower levels.
A simple example is the 5th harmonic of 200hz is 1khz. In music, there is significantly more energy at 200hz than 1khz. Harmonics at relatively high levels make their way into lower treble and higher midrange sound energy in music.
0.1% harmonic distortion is totally unacceptable. Treble from 2-3khz up is just 0.1-1% the level of bass. 0.1% harmonics from bass are a HUGE problem to 0.1-1% treble in the signal. Even 0.01% THD is still 1% distorted treble. 0.1% THD is 10% distorted treble. Discuss.
(yes, these aren't exact numbers, but they're close enough to reality - a bigger problem than most think)
Mostly talking about odd order from cheap poorly designed solid state amplifiers with higher amounts of it (this sentence addressing a post using THD from a speaker as an example)
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