Subject: Re: High frequency hearing From: John Neuhoff <jneuhoff(at)wooster.edu> Date: Thu, 7 Nov 2002 11:30:12 -0500
Perhaps audio equipment with 96 kHz sampling is a waste. However, in addition to testimonial from many recording artists that frequencies above 20kHz affect sound quality, there is this: Oohashi, et al. (2000). Inaudible High-Frequency Sounds Affect Brain Activity: Hypersonic Effect. The Journal of Neurophysiology Vol. 83 No. 6 pp. 3548-3558 http://jn.physiology.org/cgi/reprint/83/6/3548.pdf This might also be of interest: The auditory evoked magnetic fields to very high frequency tones Fujioka T, Kakigi R, Gunji A, Takeshima Y (2002) NEUROSCIENCE 112: (2) 367-381 -John ________________________________ John G. Neuhoff The College of Wooster Department of Psychology Wooster, OH 44691 http://pages.wooster.edu/jneuhoff/ Voice (330) 263-2475 FAX (928) 244-5577 *************************** APCAM 2002 Auditory Perception, Cognition, and Action Meeting A satellite to Psychonomics http://www.wooster.edu/apcam *************************** > -----Original Message----- > From: AUDITORY Research in Auditory Perception > [mailto:AUDITORY(at)LISTS.MCGILL.CA]On Behalf Of Lars Bramsl°w > Sent: Thursday, November 07, 2002 10:04 AM > To: AUDITORY(at)LISTS.MCGILL.CA > Subject: Re: High frequency hearing > > > And yet we now have audio equipment with 96 kHz sampling - what a waste! > > The only evidence I have seen - which as been forwarded by the '96 kHz' > proponents and audio manufacturers are some EEG measurements done > on humans > exposed to ultrasound, using few subjects. It is a rather indirect method > and I don't know if this has been published. > > The results could be interesting, and like Bob points out the only > meaningful way would be to have the object move. This could be done using > some kind of moving chair that would circle a small region within the > duration of one stimulus. > > Regards, > > Lars Bramsl°w > > ----------------------------------------------------- > Lars Bramsl°w > Ph.D., M.Sc.E.E. > Audiology > > Oticon A/S > Strandvejen 58 > DK - 2900 Hellerup > > phone: +45 39 13 85 42 > fax: +45 39 27 79 00 > > mailto:lab(at)oticon.dk > http://www.oticon.com > ----------------------------------------------------- > > > -----Original Message----- > From: David Robinson [mailto:david(at)ROBINSON.ORG] > Sent: 5. november 2002 15:28 > To: AUDITORY(at)LISTS.MCGILL.CA > Subject: High frequency hearing > > > I am trying to discover the limits of high frequency > hearing in the most sensitive human listeners. > > The standard MAF curve(s) are of little use because > a) The data does not extend to very high frequencies > (i.e. it usually stops between 15 and 20 kHz), and > b) the data is based on median results. > > Ideally, I would like real data to confirm the > anecdotal evidence that young and/or gifted listeners > can hear up to 25kHz (or beyond?). Equal loudness data > would be useful too, but the most useful information > would be an indication (very very roughly) of the % of > listeners of a particular age who can hear a particular > frequency at a particular amplitude. > > Is there anything like this in the published > literature? I have looked several times, but everything > I find stops at 16kHz! Also, anything other than median > results seems very thin on the ground. > > Thanks in anticipation of any help - any pointers would > be very greatfully received! > > Cheers, > David. > http://www.David.Robinson.org/ > > P.S. I can't see the local primary school being too > keen to lend out children for a high frequency > listening test - is this the reason no one else has > studied this?