Related Experiment Video
Updated: Apr 19, 2026
Sound Source Localization Testing in Single-sided Deafness Following Bone Conduction Intervention
Published on: December 20, 2024
Cochlear implantation improves localization ability in patients with unilateral deafness
Dayse Távora-Vieira1, Geert De Ceulaer, Paul J Govaerts
11Fiona Stanley Hospital, Perth, Australia; Otolaryngology, Head & Neck Surgery, School of Surgery, University of Western Australia, Perth, Australia; 2Fremantle Hospital, Alma Street, Fremantle, Australia; and 3The Eargroup, University of Antwerp, Antwerp-Deurne, Belgium.
Cochlear implants (CI) significantly improve sound localization for individuals with single-sided deafness. This study found that using a CI enhanced binaural hearing, outperforming monaural hearing without a CI.
Area of Science:
- Audiology
- Neuroscience
- Otorhinolaryngology
Background:
- Single-sided deafness (SSD) significantly impairs sound source localization.
- Cochlear implants (CI) are a potential intervention for hearing loss, but their effect on localization in SSD is under investigation.
Purpose of the Study:
- To evaluate the impact of cochlear implantation on sound localization abilities in adults with postlingual unilateral deafness.
Main Methods:
- Sixteen adult subjects with SSD received a CI on the deaf side.
- Sound localization was assessed using the auditory speech sounds evaluation (A§E) test with the CI on (binaural) and off (monaural).
- Root mean square error (RMSE) measured localization performance; stratified analyses considered gender, age at implantation, and duration of deafness.
Main Results:
- Subjects demonstrated significantly better sound localization with the CI activated (binaural) compared to when it was off (monaural).
- The root mean square error (RMSE) for localization significantly decreased with binaural hearing.
- Gender, age at implantation, and duration of deafness did not significantly influence localization ability.
Conclusions:
- Cochlear implantation is an effective treatment for improving sound localization in individuals with unilateral deafness.
- Binaural hearing facilitated by a CI leads to a significant reduction in localization error compared to monaural hearing.
