title: Sound source localization by hearing preservation patients with and without symmetrical low-frequency acoustic hearing.
abstract: The aim of this article was to study sound source localization by cochlear implant (CI) listeners with low-frequency (LF) acoustic hearing in both the operated ear and in the contralateral ear. Eight CI listeners had symmetrical LF acoustic hearing and 4 had asymmetrical LF acoustic hearing. The effects of two variables were assessed: (i) the symmetry of the LF thresholds in the two ears and (ii) the presence/absence of bilateral acoustic amplification. Stimuli consisted of low-pass, high-pass, and wideband noise bursts presented in the frontal horizontal plane. Localization accuracy was 23° of error for the symmetrical listeners and 76° of error for the asymmetrical listeners. The presence of a unilateral CI used in conjunction with bilateral LF acoustic hearing does not impair sound source localization accuracy, but amplification for acoustic hearing can be detrimental to sound source localization accuracy.
authors.affiliation: Arizona State University, Tempe, Ariz., USA.
authors.forename: Louise H
authors.initials: LH
authors.lastname: Loiselle
authors.forename: Michael F
authors.initials: MF
authors.lastname: Dorman
authors.forename: William A
authors.initials: WA
authors.lastname: Yost
authors.forename: René H
authors.initials: RH
authors.lastname: Gifford
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D019929:Cochlear Implantation; D003054:Cochlear Implants; D005260:Female; D006319:Hearing Loss, Sensorineural / Q000503:physiopathology*; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D013017:Sound Localization / Q000502:physiology*; D013067:Speech Perception / Q000502:physiology*
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