Why does speech intelligibility degrade more rapidly with increasing additive noise in cochlear implant users compared to normal-hearing listeners?

💡 Explanation

Speech intelligibility degrades more rapidly in cochlear implant users because limited spectral channel independence results in greater masking of speech signals by noise. The overlapping spectral channels cause the noise to interfere with the processed speech, therefore reducing the signal-to-noise ratio available to the user, rather than allowing them to isolate relevant spectral information as effectively as normal hearing listeners.

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