title: Precedence based speech segregation in bilateral cochlear implant users.
abstract: The precedence effect (PE) enables the perceptual dominance by a source (lead) over an echo (lag) in reverberant environments. In addition to facilitating sound localization, the PE can play an important role in spatial unmasking of speech. Listeners attending to binaural vocoder simulations with identical channel center frequencies and phase demonstrated PE-based benefits in a closed-set speech segregation task. When presented with the same stimuli, bilateral cochlear implant users did not derive such benefits. These findings suggest that envelope extraction in itself may not lead to a breakdown of the PE benefits, and that other factors may play a role.
authors.affiliation: School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson Texas 75083-0688, USA.
authors.forename: Shaikat
authors.initials: S
authors.lastname: Hossain
authors.affiliation: School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson Texas 75083-0688, USA.
authors.forename: Vahid
authors.initials: V
authors.lastname: Montazeri
authors.affiliation: School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson Texas 75083-0688, USA.
authors.forename: Peter F
authors.initials: PF
authors.lastname: Assmann
authors.affiliation: Department of Communication Disorders and Waisman Center, University of Wisconsin, Madison Wisconsin 53706, USA shaikat@utdallas.edu, vahid.montazeri@utdallas.edu, assmann@utdallas.edu, litovsky@waisman.wisc.edu.
authors.forename: Ruth Y
authors.initials: RY
authors.lastname: Litovsky
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D001302:Audiometry, Speech; D019929:Cochlear Implantation / Q000295:instrumentation*; D003054:Cochlear Implants; D003463:Cues; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010470:Perceptual Masking; D019986:Persons with Hearing Disabilities / Q000523:psychology / Q000534:rehabilitation*; D021641:Recognition, Psychology; D013017:Sound Localization; D013065:Speech Intelligibility; D013067:Speech Perception