NDLI: Spectral-peak selection in spectral-shape discrimination by normal-hearing and hearing-impaired listeners.

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Spectral-peak selection in spectral-shape discrimination by normal-hearing and hearing-impaired listeners.

Content Provider	Semantic Scholar
Author	Lentz, Jennifer J.
Copyright Year	2006
Abstract	Spectral-shape discrimination thresholds were measured in the presence and absence of noise to determine whether normal-hearing and hearing-impaired listeners rely primarily on spectral peaks in the excitation pattern when discriminating between stimuli with different spectral shapes. Standard stimuli were the sum of 2, 4, 6, 8, 10, 20, or 30 equal-amplitude tones with frequencies fixed between 200 and 4000 Hz. Signal stimuli were generated by increasing and decreasing the levels of every other standard component. The function relating the spectral-shape discrimination threshold to the number of components (N) showed an initial decrease in threshold with increasing N and then an increase in threshold when the number of components reached 10 and 6, for normal-hearing and hearing-impaired listeners, respectively. The presence of a 50-dB SPL/Hz noise led to a 1.7 dB increase in threshold for normal-hearing listeners and a 3.5 dB increase for hearing-impaired listeners. Multichannel modeling and the relatively small influence of noise suggest that both normal-hearing and hearing-impaired listeners rely on the peaks in the excitation pattern for spectral-shape discrimination. The greater influence of noise in the data from hearing-impaired listeners is attributed to a poorer representation of spectral peaks.
Starting Page	393
Ending Page	402
Page Count	10
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.indiana.edu/~pacoust/Lentz2006.pdf
PubMed reference number	16938982v1
Volume Number	120
Issue Number	2
Journal	The Journal of the Acoustical Society of America
Language	English
Access Restriction	Open
Subject Keyword	Excitation Hertz (Hz) Sensorineural Hearing Loss (disorder) hearing impairment
Content Type	Text
Resource Type	Article

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