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  • Spectral Subband Centroids for Tone Vocoder Simulations of Cochlear Implants

    Author(s)
    Chatterjee, Anwesha
    Paliwal, Kuldip
    Griffith University Author(s)
    Paliwal, Kuldip K.
    Chatterjee, Anwesha
    Year published
    2016
    Metadata
    Show full item record
    Abstract
    Cochlear Implants (CIs) have long been used to partially restore hearing in profoundly deaf individuals through direct electrical stimulation of the auditory nerve. Changes in pitch due to electrode selection have been shown to conform to the tonotopic organisation of the cochlea; i.e., each electrode corresponds to a localised band of the human hearing spectrum. Studies have shown that it may be possible to produce intermediate place percepts in some patients by stimulating pairs of adjacent electrodes simultaneously. Tone vocoder simulations with 2-16 output channels were used to evaluate the effect of producing place cues ...
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    Cochlear Implants (CIs) have long been used to partially restore hearing in profoundly deaf individuals through direct electrical stimulation of the auditory nerve. Changes in pitch due to electrode selection have been shown to conform to the tonotopic organisation of the cochlea; i.e., each electrode corresponds to a localised band of the human hearing spectrum. Studies have shown that it may be possible to produce intermediate place percepts in some patients by stimulating pairs of adjacent electrodes simultaneously. Tone vocoder simulations with 2-16 output channels were used to evaluate the effect of producing place cues similar to spectral subband centroids of each spectral analysis band. Signals were generated as a sum of sine waves positioned at the spectral subband centroid (rather than the usual centre frequency) of the frequency band relevant to each channel. Results showed improved vowel and consonant intelligibility, even with as low as 4-6 output channels.
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    Journal Title
    International Journal of Signal Processing Systems
    Volume
    4
    Issue
    4
    Publisher URI
    http://www.ijsps.com/
    DOI
    https://doi.org/10.18178/ijsps.4.4.289-294
    Subject
    Natural Language Processing
    Publication URI
    http://hdl.handle.net/10072/100762
    Collection
    • Journal articles

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