Journal of Speech, Language, and Hearing Research Vol.52 945-955 August 2009. doi:10.1044/1092-4388(2009/08-0068)
© American Speech-Language-Hearing Association
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrowCustom Print
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow My Folders
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Drgas, S.
Right arrow Articles by Blaszak, M. A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Drgas, S.
Right arrow Articles by Blaszak, M. A.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Delicious   Add to Digg   Add to Facebook   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Articles

Perceptual Consequences of Changes in Vocoded Speech Parameters in Various Reverberation Conditions

Szymon Drgas
Magdalena A. Blaszak
Adam Mickiewicz University, Poznan, Poland

Contact author: Magdalena A. Blaszak, Adam Mickiewicz University, Physics, Umultowska Street 85 Poznan 61-614, Poland. E-mail: blasaku{at}gmail.com.

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 (<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.

KEY WORDS: vocoded speech, speech intelligibility, reverberation


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Delicious Delicious   Add to Digg Digg   Add to Facebook Facebook   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?