Frication noise modulated by voicing, as revealed by pitch-scaled decomposition

Jackson, PJB and Shadle, CH (2000) Frication noise modulated by voicing, as revealed by pitch-scaled decomposition Journal of the Acoustical Society of America, 108 (4). 1421 - 1434. ISSN 0001-4966

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Abstract

A decomposition algorithm that uses a pitch-scaled harmonic filter was evaluated using synthetic signals and applied to mixed-source speech, spoken by three subjects, to separate the voiced and unvoiced parts. Pulsing of the noise component was observed in voiced frication, which was analyzed by complex demodulation of the signal envelope. The timing of the pulsation, represented by the phase of the anharmonic modulation coefficient, showed a step change during a vowel-fricative transition corresponding to the change in location of the sound source within the vocal tract. Analysis of fricatives //[phonetic beta], v, [edh], z, [yog], [vee with swirl], [backward glottal stop]// demonstrated a relationship between steady-state phase and place, and f0 glides confirmed that the main cause was a place-dependent delay.

Item Type:	Article
Additional Information:	"Copyright (2000) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.The following article appeared in (Journal of the Acoustical Society of America) and may be found at <http://asadl.org/jasa/resource/1/jasman/v108/i4/p1421_s1>the journal website</a>.
Divisions:	Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Vision Speech and Signal Processing
Depositing User:	Symplectic Elements
Date Deposited:	26 Jan 2012 14:46
Last Modified:	23 Sep 2013 18:51
URI:	http://epubs.surrey.ac.uk/id/eprint/7778

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