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328 IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, VOL. 8, NO. 2, MARCH 2000 Noise Source Models for Fricative Consonants
 

Summary: 328 IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, VOL. 8, NO. 2, MARCH 2000
Noise Source Models for Fricative Consonants
Shrikanth Narayanan, Member, IEEE, and Abeer Alwan, Member, IEEE
Abstract--Hybrid source models for fricative consonants are
derived based on aeroacoustic principles of sound generation em-
ploying vocal tract area functions obtained from magnetic reso-
nance imaging data of voiced and unvoiced English fricatives. Re-
sults based on data from a male and a female subject indicate that
a linear source-filter model is fairly adequate for capturing essen-
tial spectral characteristics of sustained voiced and unvoiced stri-
dent fricatives below 10 kHz. The hybrid source models employ a
combination of acoustic monopole and distributed dipole sources,
and a voice source in the case of the voiced fricatives. The number
of sources, source locations, and spectral characteristics and the
relative source levels are chosen based on an analysis-by-synthesis
approach and are motivated by aeroacoustic theory of speech pro-
duction. The resulting model is computationally efficient and can
be readily used for synthesis.
Index Terms--Articulatory acoustics, fricatives, magnetic reso-
nance images (MRI), noise source models, speech synthesis, turbu-

  

Source: Alwan, Abeer - Electrical Engineering Department, University of California at Los Angeles

 

Collections: Computer Technologies and Information Sciences