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Journal of Speech, Language, and Hearing Research Vol.41 990-1002 October 1998.
© American Speech-Language-Hearing Association
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Parameterization of the Voice Source by Combining Spectral Decay and Amplitude Features of the Glottal Flow

Paavo Alku 1
Erkki Vilkman 2

Anne-Maria Laukkanen 3
1 Department of Applied Physics University of Turku Turku, Finland
2 Department of Otolaryngology and Phoniatrics University of Oulu Oulu, Finland
3 Institute of Speech Communication and Voice Research University of Tampere Tampere, Finland

paavo.alku{at}hut.fi

A new method is presented for the parameterization of glottal volume velocity waveforms that have been estimated by inverse filtering acoustic speech pressure signals. The new technique, Parameter for Spectral and Amplitude Features of the Glottal Flow (PSA), combines two features of voice production, the AC value and the spectral decay of the glottal flow, both of which contribute to changes in vocal loudness. PSA yields a single parameter that characterizes the glottal flow in different loudness conditions. By analyzing voices of 8 speakers it was shown that the new parameter correlates strongly with the sound pressure level of speech.

KEY WORDS: voice production, glottal source, parameterization

Submitted on August 19, 1997
Accepted on May 4, 1998


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