PMID: 9557978Apr 29, 1998Paper

Frequency-shaped amplification changes the neural representation of speech with noise-induced hearing loss

Hearing Research
J R SchillingE D Young

Abstract

Temporal response patterns of single auditory nerve fibers were used to characterize the effects of a common hearing-aid processing scheme, frequency-shaped amplification, on the encoding of the vowel /epsilon/ in cats with a permanent noise-induced hearing loss. These responses were contrasted with responses to unmodified stimuli in control and impaired cats. Noise-induced hearing loss leads to a degraded representation of the formant frequencies, in which strong phase locking to the formants is not observed in fibers with best frequencies (BFs) near the formants and there is a wide spread of formant phase locking to fibers with higher BFs (Miller et al., 1997a,b). Frequency shaping effectively limits the upward spread of locking to F1, which improves the representation of higher frequency components of the vowel. However, it also increases phase locking to harmonics in the trough between the formants, which decreases the contrast between F1 and the trough in the neural representation. Moreover, it does not prevent the spread to higher BFs of responses to the second and third formants. The results show a beneficial effect of frequency shaping, but also show that interactions between particular gain functions and particular spe...Continue Reading

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Citations

Feb 10, 2009·Journal of the Association for Research in Otolaryngology : JARO·Bradford J MayStephanie Saylor
Sep 11, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Eric D Young
Jan 15, 2008·The Journal of the Acoustical Society of America·Chang Liu, Diane Kewley-Port
Oct 10, 2003·Journal of Neurophysiology·Michael G Heinz, Eric D Young
Jan 28, 1999·The Journal of the Acoustical Society of America·R L MillerE D Young
Jul 7, 2007·The Journal of the Acoustical Society of America·Muhammad S A Zilany, Ian C Bruce
Nov 26, 1999·The Journal of the Acoustical Society of America·R L MillerE D Young
Feb 1, 2003·The Journal of the Acoustical Society of America·Ian C BruceEric D Young
Apr 14, 2006·Audiology & Neuro-otology·Steven J Aiken, Terence W Picton
Aug 5, 2010·Perceptual and Motor Skills·Paul G Blanchet, Gregory J Snyder
May 6, 1999·Journal of Speech, Language, and Hearing Research : JSLHR·B A MartinD R Stapells
Oct 2, 2017·The Journal of the Acoustical Society of America·Dhananjaya GowdaPaavo Alku
Feb 17, 2018·Trends in Neurosciences·Nicholas A Lesica

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