Page 34 - Volume 12, Issue 2 - Spring 2012

that not only are sounds too soft, but that they are indistin- guishable and in some cases undecipherable.AT
Acknowledgments
Preparation of this article was supported by grant num- ber R01 DC 00626 [PI: Leek] from the NIDCD. Support was also provided by the Department of Veterans Affairs Rehabilitation Research and Development Service [Senior Research Career Scientist award C4042L (Leek) and Career Development grant C6116W (Molis)]. The work was sup- ported with resources and the use of facilities at the Portland VA Medical Center. The contents of this article do not repre- sent the views of the Department of Veterans Affairs or the United States Government.
References
Glasberg, B. R., and Moore, B. C. J. (1990). “Derivation of auditory filter shapes from notched-noise data,” Hearing Res. 47, 103–138.
Lorenzi, C., Gilbert, G., Carn, H., Garnier, S., and Moore, B. C. (2006). “Speech perception problems of the hearing impaired reflect inability to use temporal fine structure,” Proc. Natl. Acad. Sci. 103, 18866–18869.
Molis, M. R., and Leek, M. R. (2011). “Vowel identification by hear- ing-impaired listeners in response to variation in formant fre- quencies,” J. Speech-Language-Hearing Res. 54, 1211–1223.
Moore, B. C. (2008). “The role of temporal fine structure process- ing in pitch perception, masking, and speech perception for nor- mal-hearing and hearing-impaired people,” J. Assn. Res. Otolaryngol. 9, 399–406.
Moore, B. C. J., and Glasberg, B. R. (2004). “A revised model of loudness perception applied to cochlear hearing loss,” Hearing Res. 188, 70–88.
Patterson, R. D., Allerhand, M. H., and Giguère, C. (1995). “Time- domain modeling of peripheral auditory processing: a modular architecture and a software platform,” J. Acoust. Soc. Am. 98, 1890–1894.
ter Keurs, M., Festen, J. M., and Plomp, R. (1992). “Effect of spec- tral envelope smearing on speech reception. I,” J. Acoust. Soc. Am. 91, 2872–2880.
Michelle Molis received her Ph.D. in 2002 in experimental psychology from the University of Texas at Austin. She joined the National Center for Rehabilitative Auditory Research at the Portland VA Medical Center in 2005 as an Investigator. Her research focuses on speech perception by people with hearing loss as well as normal-hearing individuals, and in modeling vowel perception. She is particularly interested in understanding the distortions in vowel sounds that result from processing by an impaired auditory system.
Marjorie Leek is a Senior Research Career Scientist at the National Center for Rehabilitative Research, Portland VA Medical Center, and Professor in the Department of Otolaryngology Head/Neck Surgery at the Oregon Health and Science University. She received her Ph.D. in 1980 in Hearing Science from the University of Kansas. Her research focuses on auditory perception of complex sounds and speech by normal-hearing and hearing-impaired indi- viduals.
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