The perceptual effects of aliasing distortion in glottal flow modelling
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2023Access:
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Wang, Z. and Gobl, C., The perceptual effects of aliasing distortion in glottal flow modelling, International Congress of Phonetic Sciences, Prague, Czechia, 2023, 1801 - 1805Download Item:
Abstract:
When modelling the glottal flow signal in a discrete-
time system, the aliasing distortion that is produced is
typically ignored. The assumption is that the percep-
tual effects are negligible if the sampling frequency is
sufficiently high. In this paper, we implement a
recently developed version of the LF model, which
eliminates aliasing distortion. By comparing it to the
standard application of the LF model, which
introduces aliasing distortion, we can explore if, and
to what extent, aliasing distortion is perceptible in the
modelled voice source signal. The results of a
listening test demonstrate that the aliasing distortion
is almost always perceptible, even when the sampling
frequency is relatively high. The perceptual artefacts
are very noticeable when the fundamental frequency
is high, particularly in combination with a tense voice
quality. In conclusion, therefore, if high-quality
modelling of the glottal flow signal is required,
aliasing-free source modelling is recommended.
Sponsor
Grant Number
Government of Ireland
Author's Homepage:
http://people.tcd.ie/cegobl
Author: Gobl, Christer; Wang, Zihan
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