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- Newsgroups: sci.virtual-worlds
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!sgiblab!cs.uoregon.edu!news.uoregon.edu!news.u.washington.edu!stein.u.washington.edu!hlab
- From: fsjdj1@acad3.alaska.edu
- Subject: Re: SCI: Three dimensional sound?
- Message-ID: <1992Nov19.072324.3137@u.washington.edu>
- Originator: hlab@stein.u.washington.edu
- Sender: news@u.washington.edu (USENET News System)
- Organization: University of Alaska Fairbanks
- References: <1992Nov16.095935.10365@u.washington.edu>
- Date: Wed, 18 Nov 1992 20:16:59 GMT
- Approved: cyberoid@milton.u.washington.edu
- Lines: 42
-
-
- In article <1992Nov16.095935.10365@u.washington.edu>, mcmains@unt.edu (Sean McMa
- ins) writes:
- >
- >
- > What is the theory behind creating the illusion of a sound emanating
- > from a particular point in three dimensional space? With regard to
- > lateral motion, the amplitude and timing of the sounds entering each
- > ear could obviously be adjusted to create the desired effect. How
- > would one create the illusion of a sound coming from above or below
- > the listener? Or is this effect only possible through adjusting what
- > the listener hears as he moves his head?
- >
- > Any information is appreciated!
-
- Slightly off the subject, about two years ago someone posted to this group the
- names and addresses of a few companies that make boards for IBMs and Macs that
- simulate sound in a three-dimensional environment, for VR use. If you're still
- out there, could you please re-post that information? My copy of that posting
- is now in data heaven.
-
- Back to the above question, if I remember correctly it has to do specifically
- with the shape of the ear, and how we perceive those slight changes to the
- sound that are made by our ears blocking and reflecting certain wavelengths.
- (Someone please correct me or clarify.) There has been a lot of research
- done in this area for recording purposes, and I believe most of the algorithms
- are based on certain functions having to do with the shape of the "average"
- human ear, which means the results work reasonably well on most of us and
- barely on others.
-
- There is a recording technique that uses a "microphone" shaped like a human
- head, with the two real mics placed inside the ear canals. The head itself
- is supposed to be completely "average," based on several hundred thousand
- head measurements taken during research. The recordings are supposed to be
- very realistic in regards to spatial perception, but playback on anything
- other than headphones is (I've heard) a little strange.
-
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- Jack Johnson | The opinions expressed herein are
- Internet: FSJDJ1@acad3.alaska.edu | in no way related to any opinions
- BITnet: FSJDJ1@ALASKA | held by anyone, real or imagined.
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