Journal article
The impact of noise power estimation on speech intelligibility in cochlear-implant speech coding strategies (L)
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.
Language: | English |
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Publisher: | Acoustical Society of America |
Year: | 2019 |
Pages: | 818-821 |
ISSN: | 01630962 , 00014966 and 15208524 |
Types: | Journal article |
DOI: | 10.1121/1.5089887 |
ORCIDs: | Kressner, Abigail A. , May, Tobias and Dau, Torsten |