Subject: Re: FW: Intelligibility of reversed speech, Why? From: John Hershey <jhershey(at)COGSCI.UCSD.EDU> Date: Thu, 25 Jan 2001 15:58:46 -0800It's not so much about the properties of hearing as it is about the properties of speech. Basically the speech signal is relatively stationary in very short time windows. Other signals, such as rapid bird songs for instance, might be unintelligible under 50ms windowed time-reversal. ----- Original Message ----- From: "Yadong Wang" <ydwang(at)ELE.URI.EDU> To: <AUDITORY(at)LISTS.MCGILL.CA> Sent: Thursday, January 25, 2001 8:18 AM Subject: FW: Intelligibility of reversed speech, Why? Indeed, this is an excellent question, which - strangely, was not address= ed at all by the authors. Maybe this is due to a poor sensitivity to temporal-envelope phase change= s at high amplitude-modulation rates. Dau (1996) showed that we are sensitive to phase changes for low-sine modulation rates only (< 10 Hz); Patterson and coll. (Patterson, 1994; Akeroyd & Patterson (1997) also showed that sensitivity to envelope time-reversal degraded at high envelope rates. ______________________ Christian Lorenzi Equipe Perception Auditive Laboratoire de Psychologie Experimentale UMR 8581 CNRS-Universit=E9 Paris V Institut de Psychologie Universite Paris V 71, Avenue Edouard Vaillant 92774 Boulogne-Billancourt C=E9dex France phone: + 33 1 55.20.57.34 Fax: + 33 1 55.20.58.54