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Related Experiment Video

Updated: Dec 31, 2025

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

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Published on: March 24, 2023

Speech Intelligibility Enhancement by Interaural Magnification.

B Kollmeier¹, J Peissig¹

¹Drittes Physikalisches Institut, Universität Göttingen, Göttingen, Fed. Rep. of Germany.

Acta Oto-Laryngologica

|January 8, 2020

Summary

This study improved speech intelligibility for hearing-impaired individuals using a novel algorithm that enhances binaural dissimilarity. Benefits of this digital signal processing technique depend on the listener's remaining binaural function.

Keywords:

binaural intelligibility difference binaural interaction digital hearing aids

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Published on: October 11, 2024

Area of Science:

Audiology
Signal Processing
Psychoacoustics

Background:

Hearing impairment often causes reduced speech intelligibility in noise and diminished binaural hearing capabilities.
Binaural hearing, crucial for sound localization and speech perception, relies on interaural time and intensity differences.
Compensating for impaired binaural processing is key to improving auditory experiences for individuals with hearing loss.

Purpose of the Study:

To implement and evaluate a digital signal processing algorithm designed to enhance binaural dissimilarity.
To investigate the effectiveness of this algorithm in improving speech intelligibility for hearing-impaired listeners in noisy environments.
To determine the correlation between the benefits of the signal processing technique and the listener's residual binaural performance.

Main Methods:

An algorithm modifying a previous proposal was implemented on a digital signal processor to increase binaural dissimilarity.
Speech discrimination experiments were conducted using simulated spatial conditions with a dummy head setup.
Binaural tests, including binaural masking level difference and interaural time/intensity discrimination, were administered to assess auditory function.

Main Results:

For normal-hearing listeners, the binaural advantage and algorithm benefits decreased as spatial masking complexity increased.
For hearing-impaired listeners, the study found a correlation between the effectiveness of the signal processing and their remaining binaural performance.
The algorithm's benefits were contingent upon the individual's capacity for binaural processing.

Conclusions:

The implemented signal-processing technique shows potential for enhancing speech intelligibility in hearing-impaired individuals.
The degree of benefit derived from the algorithm is directly related to the listener's existing binaural hearing abilities.
Further research is warranted to optimize this technique for diverse hearing loss profiles and listening conditions.