Subject: Re: Sound Source Segregation and head motion From: Elena Grassi <egrassi(at)UMD.EDU> Date: Tue, 20 Dec 2005 10:06:51 -0500Fred...just a short comment, you seem to classify bats as: moving ears (CF bats) and immobile ears (FM bats). Eptesicus fuscus (big brown bat), for example, is an FM bat and it has moving ears.... I'm curious to see your documents could you please send them to me? Thanks a lot -elena Fred Herzfeld wrote: > Hi List Members, > > I was hoping that I would get my web site up but it is not yet > functioning. I therefore want to let everyone know that I have what > looks like a working model of the casa problem. While it will NOT > separate multiple sound sources coming from the same identical speaker > (there the work of Al Bregman comes into play) it will accurately > determine for any number of locations in 3-D space and for each such > point the frequency content, the phase angles between harmonics, the > amplitude at the source of each harmonic and the delay from that point > in space to a SINGLE receiver. As far as I can tell it is the method > used by the CF bats, the FM bats and the odontocetes. The mathematics is > extremely simple. It explains the precedence effect, reverberation, the > function of HRTF and and why some bats have moving ears (CF bats) and > some have immobile ears (FM bats). I have 3 MS Word documents which I > will send upon request. (I don't want to send attachments to the entire > list) > > Document 1..Draft of letter to Nature. 56 KB > Document 2..Draft of Patent Application without claims 100 KB > > If in some of your papers or publications you use the expressions > in-harmonic, an-harmonic or some other expression instead > "non-resolvable" please also request: > > Document 3.. "The Fundamental Frequency of a Vibration" MS Word 30 KB > > Please request by document number. I will send each as a single > attachment to separate e-mails. > > > Fred > -- Elena Grassi, Ph.D. Perceptual Interfaces and Reality Lab University of Maryland 3355 A. V. Williams Bldg College Park, MD 20742 301-405-2876 (office) 301-314-9920 (fax)