|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
76.90.39.24
In Reply to: RE: Test measurents and their overall value. posted by Michael Samra on May 15, 2016 at 14:57:12
I am coming to the same conclusion."...,I still don't believe it can measure everything we can hear as it relates to each individual."
Or even one individual on a different day. Or the same day but when that individual is in a different mood.....
I've been watching "Brain Games" a lot. We are all easily fooled. Our minds play tricks on us and we can't stop it from happening no matter what.
Here's one example (not from Brain Games).
That being said, I still don't think that is an excuse, or a license to build something that is technically wrong on purpose.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 05/15/16Follow Ups:
I'm not sure about this assumption. There are certain things we don't routinely measure, such as transient distortion. If it were easier to include all the various tests that we suspect are important, but which prove impractical or too expensive to implement, the story might be different. I personally believe that an arbitrary waveform generator in conjunction with an ultra-fast A/D could ferret out some of these unfathomable differences. In fact, I think a system capable of comparing input to output in this way would render specs like THD and frequency response all but obsolete.
--------------------------
Buy Chinese. Bury freedom.
I agree and that is a very important dynamic condition.Surprisingly we don't measure IM distortion or slew rate much anymore and I think both have a place where they can be useful being an amp or preamp doesn't just play one frequency at a time.
A friend you get for nothing,an enemy has to be bought
Which is more important, current or voltage slew rate? Is this a tube vs. SS issue? And where (at what point(s)) do you measure each?And one final question is there such a thing as the slew rate of impedance?
Edits: 05/16/16
"is there such a thing as the slew rate of impedance?"
Technically speaking, no. Impedance is a RMS function. Slew rate is based on measurements of instantaneous values.
--------------------------
Buy Chinese. Bury freedom.
Slew rate is based on measurements of instantaneous values.
To me it's one of the more important things because it's basically giving you a number of how quick an amp or preamp can respond to dramatic change in signal.You want the amp to be able to sound consistent going from extreme lows to extreme highs without sounding like your listening to two separate amplifiers that are mismatched.
A friend you get for nothing,an enemy has to be bought
"In fact, I think a system capable of comparing input to output in this way would render specs like THD and frequency response all but obsolete."
Comparing the electrical input from the source to the feed from a microphone placed at the listening position?
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
I was referring only to the amplification equipment itself. Results that include the transducers are important too, but that's a step past all this.
--------------------------
Buy Chinese. Bury freedom.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: