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The effect of glottal opening on the acoustic response of the vocal tract

The effect of glottal opening on the acoustic response of the vocal tract
The effect of glottal opening on the acoustic response of the vocal tract
In the source-filter model of speech production it is assumed that the acoustic source mechanism is independent of the
vocal tract acoustics. In fact, the changing acoustic boundary condition at the glottal end of the vocal tract may be
expected to affect the formant frequency and the formant bandwidth, with a corresponding effect on voice quality.
In this study, a geometrically simplified physical model of the vocal tract, larynx and sub-glottal tract is used in
the presence of an external applied sound field to quantify the changes to the acoustic response of the vocal tract with
changing glottal width. The applied sound field is tonal, generated by a loudspeaker, at frequencies ranging from 100
Hz to 2 kHz. The acoustic response of the vocal tract is measured with a pair of pressure transducers, spaced 8 cm apart,
and mounted flush with the vocal tract wall. The acoustic transfer function from glottis to lips of the vocal tract is
calculated from the measurements using the method described by Holland and Davies (JSV, 230(4), 915-932, 2000)
and shows an increase in the first formant frequency of the order of 13% at F1 when the glottis is open to a width of
mm compared to the closed-glottis case.
The experimental measurements will be compared to a theoretical model that takes the change in glottal
impedance with changing glottal width into account.
Barney, Anna
bc0ee7f7-517a-4154-ab7d-57270de3e815
De Stefano, Antonio
b60454c4-008f-4bd6-9aa0-9eaba15d6e94
Henrich, Nathalie
59808860-8689-41b5-bb71-dde6671e4052
Barney, Anna
bc0ee7f7-517a-4154-ab7d-57270de3e815
De Stefano, Antonio
b60454c4-008f-4bd6-9aa0-9eaba15d6e94
Henrich, Nathalie
59808860-8689-41b5-bb71-dde6671e4052

Barney, Anna, De Stefano, Antonio and Henrich, Nathalie (2005) The effect of glottal opening on the acoustic response of the vocal tract. European Acoustics Association Forum Acusticum 2005 Conference. 29 Aug - 02 Sep 2005. 6 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

In the source-filter model of speech production it is assumed that the acoustic source mechanism is independent of the
vocal tract acoustics. In fact, the changing acoustic boundary condition at the glottal end of the vocal tract may be
expected to affect the formant frequency and the formant bandwidth, with a corresponding effect on voice quality.
In this study, a geometrically simplified physical model of the vocal tract, larynx and sub-glottal tract is used in
the presence of an external applied sound field to quantify the changes to the acoustic response of the vocal tract with
changing glottal width. The applied sound field is tonal, generated by a loudspeaker, at frequencies ranging from 100
Hz to 2 kHz. The acoustic response of the vocal tract is measured with a pair of pressure transducers, spaced 8 cm apart,
and mounted flush with the vocal tract wall. The acoustic transfer function from glottis to lips of the vocal tract is
calculated from the measurements using the method described by Holland and Davies (JSV, 230(4), 915-932, 2000)
and shows an increase in the first formant frequency of the order of 13% at F1 when the glottis is open to a width of
mm compared to the closed-glottis case.
The experimental measurements will be compared to a theoretical model that takes the change in glottal
impedance with changing glottal width into account.

Full text not available from this repository.

More information

Published date: 2005
Venue - Dates: European Acoustics Association Forum Acusticum 2005 Conference, 2005-08-29 - 2005-09-02

Identifiers

Local EPrints ID: 28314
URI: http://eprints.soton.ac.uk/id/eprint/28314
PURE UUID: 2b613c7b-7909-49af-99cd-6eb4744a124a
ORCID for Anna Barney: ORCID iD orcid.org/0000-0002-6034-1478

Catalogue record

Date deposited: 02 May 2006
Last modified: 10 Dec 2019 01:51

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Contributors

Author: Anna Barney ORCID iD
Author: Antonio De Stefano
Author: Nathalie Henrich

University divisions

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