Cortical correlates of speech intelligibility measured using functional near-infrared spectroscopy (fNIRS).

Authors: Lawrence RJ, Wiggins IM, Anderson CA, Davies-Thompson J, Hartley DEH Abstract Functional neuroimaging has identified that the temporal, frontal and parietal cortex support core aspects of speech processing. An objective measure of speech intelligibility based on cortical activation in these brain regions would be extremely useful to speech communication and hearing device applications. In the current study, we used noise-vocoded speech to examine cortical correlates of speech intelligibility in normally-hearing listeners using functional near-infrared spectroscopy (fNIRS), a non-invasive, neuroimaging technique that is fully-compatible with hearing devices, including cochlear implants. In twenty-three normally-hearing adults we measured (1) activation in superior temporal,...

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