The impact of noise power estimation on speech intelligibility in cochlear-implant speech coding strategies (L)

Thomas Bentsen, Stefan J. Mauger, Abigail A. Kressner*, Tobias May, Torsten Dau

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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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.

Original languageEnglish
JournalJournal of the Acoustical Society of America
Volume145
Issue number2
Pages (from-to)818-821
Number of pages4
ISSN0001-4966
DOIs
Publication statusPublished - 2019

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