Neural-scaled entropy as a model of information for speech perception

Joshua M. Alexander*, Varsha Hariram

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Neural-Scaled Entropy (NSE) is an objective metric used to quantify 'information' available in speech consequent hearing loss, hearing aid signal processing, and distortion from various environmental factors. One pursuit is to use NSE to find optimum hearing aid settings that maximize speech perception. Inspired by the Cochlear-Scaled Entropy model [Stilp et al., 2010, J. Acoust. Soc. Am., 2112-2126], NSE uses the neural spike output at the inner hair cell synapse of an auditory nerve model [Zilany et al. 2009, J. Acoust. Soc. Am., 126, 2390-2412]. Probability of spike output from fibers sampled at equidistant places along the model cochlea is computed for short duration time frames. Potential information is estimated by using the Kullback-Liebler Divergence to describe how the pattern of neural firing at each frame differs from preceding frames in an auto-regressive manner. NSE was tested using nonsense syllables from various perceptual studies that included different signal processing schemes and was compared to performance for different vowel-defining parameters, consonant features, and talker gender. NSE has potential to serve as a model predictor of speech perception, and to capture the effects of sensorineural hearing loss beyond simple filter broadening.

Original languageEnglish (US)
Article number050179
JournalProceedings of Meetings on Acoustics
Volume19
DOIs
StatePublished - 2013
Externally publishedYes
Event21st International Congress on Acoustics, ICA 2013 - 165th Meeting of the Acoustical Society of America - Montreal, QC, Canada
Duration: Jun 2 2013Jun 7 2013

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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