Subject: Re: The Perception of Phase over Headphones From: Roy Patterson <roy.patterson(at)MRC-CBU.CAM.AC.UK> Date: Mon, 26 Jun 2000 11:22:52 +0100Dear Frank, I agree with Jont when he says "If the group delay variations, either between the two ears, or across frequency in one ear, are too large, then you will hear that delay." With regard to the perception of phase distortion over headphones, in addition to the papers Jont noted by Doug Pries, you might like to also look at Patterson, R.D. (1987). A pulse ribbon model of monaural phase perception. J. Acoust. Soc. Am., 82, 1560-1586. In this paper, we measured the perception of group delay and set out the limits for the detection of group delay. The interesting thing to note is that it is that it depends on stimulus bandwidth as if the relevant value is the total delay across the available listening region. The relevant section of the paper is that on MPH waves. Regards, Roy Patterson There are some good phase perception papers, of maybe 10 or more years ago, by Doug Pries (if I remember correctly) in the J of the AES. He is a Prof. at Tufts Univ. I dont think it was earphone listening in his case, but loudspeaker. Not sure about that." __________________________________________________ Roy D. Patterson Centre for the Neural Basis of Hearing Physiology Department, University of Cambridge Downing Street, Cambridge, CB2 3EG phone 44 (1223) 333819 office phone 44 (1223) 333837 lab fax 44 (1223) 333840 department email rdp1(at)cam.ac.uk or email roy.patterson(at)mrc-cbu.cam.ac.uk http://www.mrc-cbu.cam.ac.uk/personal/roy.patterson/ http://www.mrc-cbu.cam.ac.uk/personal/roy.patterson/aim http://www.mrc-cbu.cam.ac.uk/personal/roy.patterson/cnbh