Open AccessSound Source Localization by Hearing Preservation Patients with and without Symmetrical Low-Frequency Acoustic Hearing
Author(s) -
Louise Loiselle,
Michael F. Dorman,
William A. Yost,
René H. Gifford
Publication year - 2015
Publication title -
audiology and neurotology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.106
H-Index - 78
eISSN - 1421-9700
pISSN - 1420-3030
DOI - 10.1159/000367883
Subject(s) - acoustics , acoustic source localization , sound localization , audiology , infrasound , sound (geography) , wideband , noise (video) , physics , computer science , medicine , artificial intelligence , optics , image (mathematics)
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.
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