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- W2896774829 abstract "Cochlear implant (CI) patients have difficulty encoding spectral aspects of a speech signal, and are at a severe disadvantage compared to normal hearing listeners in distinguishing consonants that differ by place of articulation (PoA). One reason for this difficulty could be due to a shifting of spectral energy that occurs with a shallow insertion depth of the electrode array. The present study aimed to measure the effects of spectral shifting on phoneme categorization and PoA perception specifically. Speech was vocoded and then shifted by 0, 2, 4, and 6 mm in cochlear space to simulate shallow CI insertion depth in normal hearing listeners. Stimuli included a /b-d/ and /s-ʃ/ continua that differed by PoA, as well as /ra/ and /la/, to create a six-alternative forced choice paradigm. Results show phoneme categorization became less categorical, with a biased perception of /b-d/ and /s-ʃ/ continuum towards /d/ and /s/ respectively, consistent with higher-frequency energy in those consonants. Some participants were better at recalibrating to the spectrally shifted stimuli than others, as their perception of each continua remained somewhat balanced with increased amounts of spectral shifting. This study showcases the potential consequences and individual differences resulting from shallow insertion depth of a CI." @default.
- W2896774829 created "2018-10-26" @default.
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- W2896774829 date "2018-09-01" @default.
- W2896774829 modified "2023-10-16" @default.
- W2896774829 title "Perceiving phonemes with simulated variable cochlear implant insertion depths" @default.
- W2896774829 doi "https://doi.org/10.1121/1.5068077" @default.
- W2896774829 hasPublicationYear "2018" @default.
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