Abstract

Acoustic waveforms of the strident fricatives /s/, /z/, /sh/, and /yog/ spoken by two native American English speakers are analyzed using modern chaotic analysis techniques. Fricative data are extracted from both intervocalic and sustained utterances. For comparison, acoustic waveforms of the vowels /a/, /i/, and /u/ are also analyzed. For 44% of the unvoiced fricative tokens in VCV contexts and 59% of the sustained voiced fricatives, indications of low‐dimensional dynamics could be found with the given limitations of stationarity. The low‐dimensional chaotic behavior is exhibited by a correlation dimension (D2) ranging between 3 and 7.2, and by positive maximum Lyapunov exponents (LEs). For the remaining fricatives, results suggest that the dimensional complexity therein is greater than the maximum D2 value that could be reliably estimated from the available data (about 7.8 for the intervocalic cases and 9 for the …

Date

1995

Authors

Shrikanth S Narayanan, Abeer A Alwan

Journal

The Journal of the Acoustical Society of America

Volume

97

Issue

4

Pages

2511-2524

Publisher

Acoustical Society of America