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ERIC Number: EJ851395
Record Type: Journal
Publication Date: 2009-Aug
Pages: 11
Abstractor: As Provided
Reference Count: 43
ISSN: ISSN-1092-4388
Perceptual Consequences of Changes in Vocoded Speech Parameters in Various Reverberation Conditions
Drgas, Szymon; Blaszak, Magdalena A.
Journal of Speech, Language, and Hearing Research, v52 n4 p945-955 Aug 2009
Purpose: To study the perceptual consequences of changes in parameters of vocoded speech in various reverberation conditions. Method: The 3 controlled variables were number of vocoder bands, instantaneous frequency change rate, and reverberation conditions. The effects were quantified in terms of (a) nonsense words' recognition scores for young normal-hearing listeners, (b) ease of listening based on the time of response (response delay), and (c) the subjective measure of difficulty (10-degree scale). Results: It has been shown that the fine structure of a signal is a relevant cue in speech perception in reverberation conditions. The results obtained for different number of bands, frequency-modulation cutoff frequencies, and reverberation conditions have shown that all these parameters are important for speech perception in reverberation. Conclusions: Only slow variations in the instantaneous frequency (less than 50 Hz) seem to play a critical role in speech intelligibility in anechoic conditions. In reverberant enclosures, however, fast fluctuations of instantaneous frequency are also significant. (Contains 6 figures and 3 tables.)
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A