8th Annual Conference of the International Speech Communication Association

Antwerp, Belgium
August 27-31, 2007

Acoustic Correlates of Intelligibility Enhancements in Clearly Produced Fricatives

Kazumi Maniwa (1), Allard Jongman (2), Travis Wade (3)

(1) University of Konstanz, Germany
(2) University of Kansas, USA
(3) University of Stuttgart, Germany

Two experiments investigated whether and how clear speech production enhances intelligibility of English fricatives for normal-hearing listeners and listeners with simulated hearing impairment. Babble thresholds were measured for minimal pair distinctions. Clear speech benefited both groups overall; however, for impaired listeners, the clear speech effect held only for sibilant pairs. Correlation analyses comparing acoustic and perceptual data indicated that a shift of energy concentration toward higher frequency regions and greater source strength contributed to the clear speech effect for normal-hearing listeners, while listeners with simulated loss seemed to benefit mostly from cues involving lower frequency regions.

Full Paper

Bibliographic reference.  Maniwa, Kazumi / Jongman, Allard / Wade, Travis (2007): "Acoustic correlates of intelligibility enhancements in clearly produced fricatives", In INTERSPEECH-2007, 406-409.