Sound source localization by hearing preservation patients with and without symmetrical low-frequency acoustic hearing

Louise H. Loiselle, Michael Dorman, William Yost, René H. Gifford

Research output: Contribution to journalArticle

13 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)166-171
Number of pages6
JournalAudiology and Neurotology
Volume20
Issue number3
DOIs
StatePublished - May 28 2015

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Keywords

  • Acoustic hearing
  • Cochlear implants
  • Hearing aids
  • Hearing preservation
  • Localization

ASJC Scopus subject areas

  • Physiology
  • Otorhinolaryngology
  • Sensory Systems
  • Speech and Hearing

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