John Curl's Blowtorch preamplifier

[PMA]

Regarding development in shape of equal loudness curves:

http://www.nedo.go.jp/itd/grant-e/re...pdf/is-01e.pdf

[syn08]

Originally posted by PMA
Just for the record -

Yeah, I am impressed. And your point is?

[PMA]

My point is that we should be open-minded and not to rely on current level of knowledge, especially when psychoacoustics (not pejorative) is still not well explored.

[ingrast]

Originally posted by PMA
My point is that we should be open-minded and not to rely on current level of knowledge, especially when psychoacoustics (not pejorative) is still not well explored.

Pavel, I wonder why the null test procedure is not more fully explored, being at this time ample availability of equipment and software to distill as much information as one cares imagine.

Whenever results from device A are closer to null than device B, and still someone claims decive B is better sounding, we have a smoking gun for self deception or worse.

Rodolfo

PS. Granted there is not such thing as perfect NULL, but this can be qualified with some confidence, that is why I mention rather heavy data massaging to extract results, i.e. spectral composition, correlated an uncorrelated spurious etc.

[PMA]

Rodolfo, I assume that deeply explored result of properly applied null test might be a good direction.

[ingrast]

Originally posted by PMA
Rodolfo, I assume that deeply explored result of properly applied null test might be a good direction.

For me, the merit is that instead of endless speculation about sources of imperfection, it may point to concrete issues to investigate.

Rodolfo

[syn08]

Originally posted by PMA
My point is that we should be open-minded and not to rely on current level of knowledge, especially when psychoacoustics (not pejorative) is still not well explored.

You can study the ear physiology and the psychoacoustic until the cows come home, this will not change the dynamic range of the human hearing. You may find an explanation as of why, but this will not change the reality that you can't hear a whisper during a wild rock concert. Neither can you hear metal film resistors through 1% (at best) distortion speakers.

And yes, I am one of those supposingly deaf engineers and I'm d*mn proud of it. And very happy that I am not supposed to make a coin in this very sad audio industry.

[PMA]

Your offensive and offending posts do not bring any insight.

[Juergen Knoop]

I may be wrong, but do the new curves suggest an even lesser sensivity to high order/frequency harmonics than the old ones?
regards

[zinsula]

Fully agree, Pavel.

Btw, what gives us the ability to perceive the angle of a acoustic source in z direction (i.e. below our head, horizontal, 45° inclined, 90° straight above..., etc.)?
Something with the auricle i think. But how?

Tino