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This are honest questions...............

not an attempt to go trolling.

What are the definitions for the limits of human perception?

Exactly what are the frequency response limits? What percent distortion can be perceived? Not the average, but the range from super sensitive to non sensitive.....

Considering that the best "noses" can detect one part per billion as determined by a spectrographic analysis, what kind of parameters are applicable in the aural nature of human perception? You say you measured phase response, what was the range measured and at what frequencies? How much phase shift can a human actually perceive? CAn trainin increase perception?

Everyone has measurements and think that whatever machine they have to measure is the end to all measurements. Weird how Matti Otala comes up with a new distortion measurement besides THD and IM (TIM), when the two were considered all that was necessary way back in the 70"s IIRC. Do engineers have every possible parameter that can affect human hearing defined?

If so, how come they can't reproduce a Stradivarius violin? In fact, how come even Stradivarius couldn't maintain a consistency with all his instruments...... Yamaha has spent millions trying to reproduce the best sound for all the instruments they make but yet the individual makers still command a certain amount of clientele with specific desires. Shouldn't this be a simple engineering issue?

When you state the propagation speed is not an issue, are you defining this only at audio frequencies, or are you ignoring the frequencies above the so called range of human hearing? Are you saying that there are no such thing as subharmonics, which some engineers claim affect the audible range? Can phase shift be related to this effect?

You make some blanket statements, but the sense I get is that you have made many assumptions, ignoring certain other possible parameters.


YMMV obviously,

Stu

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