Subject: Re: high quality sound system for fMRI From: Marc Joanisse <marcj(at)UWO.CA> Date: Thu, 21 Aug 2003 11:44:35 -0400Thomas, We have been using a custom-made pneumatic system that conducts sound via PVC tubes to a pair of noise attenuating earmuffs. The audio quality is good up to about 6KHz, which is fine for what we've been doing so far. We are now experimenting with an off the shelf system made by Resonance Technology, which appear to use a piezoelectric or electrostatic speaker encased in the headset, but I am not sure of the exact specs (the literature says simply that it is nonpneumatic). It also includes a noise-attenuated microphone in the scanner, and a microphone & volume control unit so it can also be used as an intercom. The web site for this system is: http://www.mrivideo.com/temp/functionalmri/commander.html We haven't tested it much so far, but for an off the shelf system it seems to work well. They claim 100 - 25000 Hz frequency response (elsewhere on the site, they say 20 hz to 30 KHz), but they don't provide an audiogram that shows how flat that reponse is, and we haven't had a chance to test their claim as of yet. -Marc- On August 8, 2003 04:04 pm, tnt(at)physiol.ox.ac.uk wrote: > Hello List, > > Does anybody know about an off-the-shelf, high quality, MRI-compatible > sound system that is good enough for presenting HRTF's? > > Any information on this topic would be much appreciated! > > Best wishes, > > Thomas > > > --------------------------------------------------- > Thomas Thesen > University Laboratory of Physiology > University of Oxford > Oxford, OX1 3PT > United Kingdom > > Phone: +44(0)1865-272434 > Mobile: +44(0)7816-932303 > Fax: +44(0)1865-272469 > e-mail: thomas.thesen(at)physiology.oxford.ac.uk > http://www.fmrib.ox.ac.uk/~tnt/ > > --------------------------------------------------- > > > > -------------------------------------------------------------------- > mail2web - Check your email from the web at > http://mail2web.com/ . -- Marc Joanisse, Assistant Professor Department of Psychology and Program in Neuroscience The University of Western Ontario marcj(at)uwo.ca http://publish.uwo.ca/~marcj