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Updated: Jan 28, 2026

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
Published on: June 21, 2024
The impact of noise power estimation on speech intelligibility in cochlear-implant speech coding strategies
Thomas Bentsen1, Stefan J Mauger2, Abigail A Kressner1
1Hearing Systems Group, Department of Electrical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
Abstract:
The advanced combination encoder (ACE™) is an established speech-coding strategy in cochlear-implant processing that selects a number of frequency channels based on amplitudes. However, speech intelligibility outcomes with this strategy are limited in noisy conditions. To improve speech intelligibility, either noise-dominant channels can be attenuated prior to ACE™ with noise reduction or, alternatively, channels can be selected based on estimated signal-to-noise ratios. A noise power estimation stage is, therefore, required. This study investigated the impact of noise power estimation in noise-reduction and channel-selection strategies. Results imply that estimation with improved noise-tracking capabilities does not necessarily translate into increased speech intelligibility.
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