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2018 | OriginalPaper | Chapter

12. Scalogram and Nonlinear Analysis of Speech

Author : Mohamed Hesham Farouk

Published in: Application of Wavelets in Speech Processing

Publisher: Springer International Publishing

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Abstract

As voice source generally interacts with the vocal tract in a nonlinear way, the interaction may take place at the glottis during the periodic vibration of vocal cords. The resulting excitation affects the lower-frequency components of produced voice at lips. Instead, turbulent sound source interacts in a way that influences the higher-frequency components. So, the wavelet decomposition can explore such nonlinear behavior through MRA. Nonlinear and chaotic components of a speech signal can be verified through scalogram analysis obtained from such MRA using CWT. A scale index obtained from CWT can confirm chaotic behavior even for highly periodic waveforms which is the case in speech vowels.

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previous chapter Speech Quality Assessment
next chapter Steganography, Forensics, and Security of Speech Signal
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Metadata
Title
Scalogram and Nonlinear Analysis of Speech
Author
Mohamed Hesham Farouk
Copyright Year
2018
Book
Application of Wavelets in Speech Processing

Print ISBN: 978-3-319-69001-8

Electronic ISBN: 978-3-319-69002-5

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-69002-5_12