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In Reply to: RE: Listen for yourself posted by Tre' on July 07, 2017 at 11:55:13
and Crowhurst even fought for a weighting system which would have assigned higher penalties for 5,7, and 9. There is text somewhere on the net about him and some BBC guys advocating for this but were shouted down by manufacturers. and they specifically mentioned upper odd harmonics at some crazy low levels being very annoying.
Follow Ups:
Yes and these were serious proposals.One would be multiplying the percentage measured by the order. 5th would be the measured % times 5. 7th would be the measured % times 7.
The other proposed method would have been the % measured times the square of the order. 5th would be the measured % times 25 and 7th would be the measured % times 49.
These proposals were intended to better reflect the annoyance factor.
THD doesn't tell us much in terms of the annoyance factor. We need to now the orders of the HD.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 07/07/17
"and Crowhurst even fought for a weighting system which would have assigned higher penalties for 5,7, and 9. There is text somewhere on the net about him and some BBC guys advocating for this but were shouted down by manufacturers. and they specifically mentioned upper odd harmonics at some crazy low levels being very annoying."I agree that that is a very interesting point, and maybe is highly relevant. Do you, as a matter of interest, know if SET amplifiers tend to have lower odd-harmonic distortions than PP amplifiers? I just don't know one way or the other; I don't recall ever having seen studies of this question.
In any case, such things should lie within the threshold of measurability, presumably, and so they would be part of the whole package of "measurements that can be correlated with observation" in the spirit of the scientific method.
Chris
Edits: 07/07/17
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