Frication noise modulated by voicing, as revealed by pitch-scaled decomposition
Frication noise modulated by voicing, as revealed by pitch-scaled decomposition
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 noise source within the vocal tract. Analysis of fricatives /B, v, dh, z, zh, gh, q/ demonstrated a relationship between steady-state phase and place, and f0 glides confirmed that the main cause was a place-dependent delay.
1421-1434
Jackson, P.J.B.
81dc3458-f913-44b4-9829-ecb626df5278
Shadle, C.H.
dc56253d-9926-466f-a27c-b9a8252a5304
October 2000
Jackson, P.J.B.
81dc3458-f913-44b4-9829-ecb626df5278
Shadle, C.H.
dc56253d-9926-466f-a27c-b9a8252a5304
Jackson, P.J.B. and Shadle, C.H.
(2000)
Frication noise modulated by voicing, as revealed by pitch-scaled decomposition.
Journal of the Acoustical Society of America, 108 (4), .
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 noise source within the vocal tract. Analysis of fricatives /B, v, dh, z, zh, gh, q/ demonstrated a relationship between steady-state phase and place, and f0 glides confirmed that the main cause was a place-dependent delay.
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Published date: October 2000
Additional Information:
See <a href="http://web.bham.ac.uk/p.jackson/nephthys/"> http://web.bham.ac.uk/p.jackson/nephthys/</a> for further information. Address: Melville, NY
Organisations:
Electronics & Computer Science
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Local EPrints ID: 253960
URI: http://eprints.soton.ac.uk/id/eprint/253960
ISSN: 0001-4966
PURE UUID: 8a43aa29-7115-4f7f-a44e-6d423c380baa
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Date deposited: 04 Apr 2001
Last modified: 08 Jan 2022 17:36
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Author:
P.J.B. Jackson
Author:
C.H. Shadle
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