TITLE

Effect of F2 Intensity on Identity of /u/ in Degraded Listening Conditions

AUTHOR(S)
Hedrick, Mark S.; Nabelek, Anna K.
PUB. DATE
October 2004
SOURCE
Journal of Speech, Language & Hearing Research;Oct2004, Vol. 47 Issue 5, p1012
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The current study investigated the influence of the second formant (F2) intensity on vowel labeling along a /u/-/i/ continuum. Twenty-two listeners with normalhearing (NH) sensitivity and 14 listeners with sensorineural hearing impairment (HI) were initially presented 2 stimuli for which the F2 intensity differed by 20 dB. The listeners were asked to label the 2 stimuli categorically as /u/ or /i/. After passing this criterion test, listeners were presented 9 stimuli whose F2 intensity varied within the 20-dB range. The 9 stimuli were evaluated in 3 listening conditions: in quiet, in the presence of a continuous speech spectrum noise (0-dB signal-to-noise ratio), and in the presence of reverberation ( T = 1.0 s). The intensity manipulation altered the vowel labeling of NH listeners and yielded a differential effect in noise versus reverberation. Only 5 of the HI listeners were able to pass the criterion test, and of these 5, only 2 were able to label the 9 stimuli categorically. Results from HI listeners suggest problems in categorizing spectral shape.
ACCESSION #
15087237

 

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