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John Curl's Blowtorch preamplifier part III
John Curl's Blowtorch preamplifier part III
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Old 19th January 2020, 12:50 AM   #35501
billshurv is offline billshurv  United Kingdom
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John Curl's Blowtorch preamplifier part III
Oh and there IS money for research, but it's generally driven by the gaming industry for synthesising a 3D soundfield on the fly for headphone wearing basement dwellers. There is little money for testing older men listening in stereo as we are not the target market.
 
Old 19th January 2020, 12:57 AM   #35502
indra1 is offline indra1  Indonesia
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And yourself?
I'm just a retired hobbyist, it's fun helping beginners and learn from the more experienced.
 
Old 19th January 2020, 01:02 AM   #35503
DPH is offline DPH  United States
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Originally Posted by Hans Polak View Post
Psychological evaluation indicated that the subjects felt the sound containing an HFC to be more pleasant than the same sound lacking an HFC.
These results suggest the existence of a previously unrecognized response to complex sound containing particular types of high frequencies above the audible range.
We term this phenomenon the “hypersonic effect.”


Why do we need Pet-scans and EEGs if added ultrasonics result in a more "pleasant" sound.
The listener seemed to have been aware of the added HFC, so why can't the "feeling pleasant", because now he got the full treatment, be seen as the cause of the changed Pet/EEG instead of concluding that he "heard" something.
What would have happened to Pet/EEG with and without showing a Playmate of the month to exclude this emotional effect, seriously !

One last remark: the ultra full range speaker that I mentioned in, John Curl's Blowtorch preamplifier part III, could very well be an active system to keep the signals offered to the speakers as pure as possible and the overall FR as flat as possible. But stick to the rule of reducing the amount of variables to the minimum, in this case to just one.

Hans
It should also be noted that fMRI data should be taken with a really healthy dose of salt. It's a field of study worth studying for a "how to spurious correlate". It might have cleaned up its act since then, but certainly most early fMRI studies should be treated with the greatest of incredulity.

Can we trust statistics in fMRI studies? | PLOS Neuroscience Community
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Old 19th January 2020, 01:08 AM   #35504
Markw4 is offline Markw4  United States
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Originally Posted by billshurv View Post
No testing of their abilities to hear things 150dB down has been made.
How would you know it is nonlinear distortion they are hearing? Small ladder network effect from dielectric absorption?

Last edited by Markw4; 19th January 2020 at 01:11 AM.
 
Old 19th January 2020, 01:15 AM   #35505
billshurv is offline billshurv  United Kingdom
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John Curl's Blowtorch preamplifier part III
It's all anecdote so probably in the mind.
 
Old 19th January 2020, 01:18 AM   #35506
chris719 is offline chris719  United States
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John Curl's Blowtorch preamplifier part III
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No, but I claim you are looking for a differentiator, aka a "secret sauce", for your AK4499 DAC development. A known obsession of all "audio professionals".
Yep, if he had the ability to design his own converter from scratch, he would tell you how AK4499 sucks and his discrete design was best.

Very common as you observed. Lots of hate on op-amps from the discrete crowd, no matter how it performs.
 
Old 19th January 2020, 01:27 AM   #35507
chris719 is offline chris719  United States
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John Curl's Blowtorch preamplifier part III
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It should also be noted that fMRI data should be taken with a really healthy dose of salt. It's a field of study worth studying for a "how to spurious correlate". It might have cleaned up its act since then, but certainly most early fMRI studies should be treated with the greatest of incredulity.

Can we trust statistics in fMRI studies? | PLOS Neuroscience Community
PET is not super accurate either when the scan goes longer.
 
Old 19th January 2020, 01:28 AM   #35508
scott wurcer is offline scott wurcer  United States
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There is no money for research.
You create an impasse here, the industry at large or "we" have to spend 100's of man hours and 1000's of dollars to refute casual uncontrolled listening impressions of a few people. How about you finance a program to support your claims.
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Old 19th January 2020, 01:32 AM   #35509
Markw4 is offline Markw4  United States
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...probably in the mind.
Mostly so, same as vision and speech.
 
Old 19th January 2020, 04:44 AM   #35510
AllenB is offline AllenB  Australia
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John Curl's Blowtorch preamplifier part III
Discussion has been moved to John Curl's Blowtorch preamplifier part IV

Thank you.
 

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