The effect of glottal opening on the acoustic response of the vocal tract
Barney, Anna, De Stefano, Antonio and Henrich, Nathalie (2005) The effect of glottal opening on the acoustic response of the vocal tract. In, European Acoustics Association Forum Acusticum 2005 Conference, Budapest, 29 Aug - 02 Sep 2005. Budapest, 6pp.
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Description/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.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Related URLs: | |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Signal Processing and Control |
| Item ID: | 28314 |
| Date Deposited: | 02 May 2006 |
| Last Modified: | 01 Jun 2011 11:26 |
| Contributors: | Barney, Anna (Author) De Stefano, Antonio (Author) Henrich, Nathalie (Author) |
| Date: | 2005 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/28314 |
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