[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: High-frequency hearing in humans
Not wishing to pile on, but unfortunately I have to say I too am very skeptical of such claims....
Unless the replay system these claimed differences are heard on is really top-notch, there is no way this can make any sense.
As Bob notes below, there are a very small fraction of loudspeakers with any output of meaningful quality beyond 18-20kHz, let alone 24kHz and seriously... good luck finding with something out to 48kHz.
Even if the replay system is able to provide a linear response out to 48kHz, unless he/you are creating/recording the source material, I don't know where/what that might be coming from? And remember the recording system/microphone/etc need to have the same wide-band response for this to make any sense....).
On Feb 4, 2011, at 9:20 AM, Bob Masta wrote:
> On 3 Feb 2011 at 23:08, Kevin Austin wrote:
>> Anecdotally, I know someone who can 'hear a difference'
>> between a 96kHz and 192kHz recording. He's not sure
>> "what" the difference is, but he hears it. [He's one of
>> the few people whose hearing I really trust.] This
>> implies [somehow] that there are / were people who had
>> this 'extra' advantage of extremely wide frequency
> I must say I am extremely skeptical that he is actually
> hearing a frequency response difference. If these are
> commerical music recordings, then I would ask what else is
> different besides the sample rates... a "premium" recording
> might also use different microphones, different placement,
> etc, etc.
> Not intending to offend your friend, but I have noticed
> that, in general, when such "extreme audiophile" claims are
> made they never involve double-blind testing. Admittedly,
> that might be very difficult to do properly, so that a
> stray perceptual cue didn't give away the game. But
> otherwise this is a case of extraordinary claims needing
> extraordinary evidence.
> If he really can hear a difference in sample rates, and it
> is not due to anti-aliasing filter artifacts, then
> presumably he could be tested entirely with 192 kHz
> material that had various cutoff frequencies applied, or
> (better yet) using synthesized clicks having controlled
> spectral content.
> And note that getting headphones or speakers that have
> acceptable output above even 24 kHz is not trivial, and
> above 48 kHz is probably going to involve a quest in
> Best regards,
> Bob Masta
> D A Q A R T A
> Data AcQuisition And Real-Time Analysis
> Scope, Spectrum, Spectrogram, Signal Generator
> Science with your sound card!