Speech perception in simulated electric hearing exploits information-bearing acoustic change.
Stilp and Kluender [(2010). Proc. Natl. Acad. Sci. U.S.A. 107(27), 12387-12392] reported measures of sensory change over time (cochlea-scaled spectral entropy, CSE) reliably predicted sentence intelligibility for normal-hearing listeners. Here, implications for listeners with atypical hearing were explored using noise-vocoded speech. CSE was parameterized as Euclidean distances between biologically scaled spectra [measured before sentences were noise vocoded (CSE)] or between channel amplitude profiles in simulated cochlear-implant processing [measured after vocoding (CSE(CI))]. Sentence intelligibility worsened with greater amounts of information replaced by noise; patterns of performance did not differ between CSE and CSE(CI). Results demonstrate the importance of information-bearing change for speech perception in simulated electric hearing.
Department of Psychological and Brain Sciences, University of Louisville, Louisville, Kentucky 40292, USA. christian.stilp@louisville.edu
Christian E
CE
Stilp
Matthew J
MJ
Goupell
Keith R
KR
Kluender
D000161:Acoustic Stimulation; D001302:Audiometry, Speech; D019929:Cochlear Implantation / Q000295:instrumentation*; D003054:Cochlear Implants; D003198:Computer Simulation; D012048:Correction of Hearing Impairment / Q000523:psychology*; D006801:Humans; D009622:Noise / Q000009:adverse effects*; D010470:Perceptual Masking; D019986:Persons with Hearing Disabilities / Q000523:psychology / Q000534:rehabilitation*; D013018:Sound Spectrography; D013061:Speech Acoustics; D013065:Speech Intelligibility; D013067:Speech Perception