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Updated: May 29, 2026

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

Published on: March 13, 2026

Towards quantifying cochlear implant localization performance in complex acoustic environments.

S Kerber¹, B U Seeber

¹MRC Institute of Hearing Research, University Park, Nottingham, UK.

Cochlear Implants International

|September 16, 2011

Summary

This summary is machine-generated.

Bilateral cochlear implant (CI) users experience significant sound localization difficulties in noise. This study found CI users had much higher localization errors than normal-hearing listeners, especially with background noise.

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Last Updated: May 29, 2026

An Automated System for Sound Localization Testing in Hearing-Impaired Listeners

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Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Enhancing Electrode Location Assessment in Cochlear Implantation via Computed Tomography Image Fusion

Published on: January 17, 2025

Area of Science:

Audiology
Neuroscience
Speech and Hearing Science

Background:

Cochlear implant (CI) users often report challenges in noisy environments.
Binaural hearing is crucial for speech understanding in noise for normal-hearing individuals.
Quantifying binaural hearing in CI users with multiple sound sources is underexplored.

Purpose of the Study:

To measure the horizontal sound localization ability of a bilateral CI user.
To compare the CI user's localization performance with normal-hearing listeners.
To assess localization in quiet and in diffuse background noise.

Main Methods:

A pointing task was employed to assess horizontal sound localization.
Localization was tested in quiet and with a continuous diffuse noise interferer at 0 dB SNR.
Performance was evaluated for one bilateral CI user and six normal-hearing listeners.

Main Results:

Normal-hearing listeners showed a small increase in localization error (1.8°) in noise.
The bilateral CI user exhibited a large localization error (22° in quiet, 31° in noise).
Target sounds were inaudible for the CI user at frontal locations (-20° to +20°) in noise.

Conclusions:

Bilateral CI users face substantial sound localization deficits compared to normal-hearing individuals.
Background noise significantly exacerbates localization difficulties for CI users.
Findings support CI user complaints and can inform the development of noise reduction algorithms for implant processors.