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Medical Engineering & Physics 24 (2002) 453460 www.elsevier.com/locate/medengphy

Summary: Medical Engineering & Physics 24 (2002) 453­460
Hybrid parametric-physiological glottal modelling with application
to voice quality assessment
Carlo Drioli
, Federico Avanzini
Dipartimento di Elettronica e Informatica, Universita` di Padova, Via Gradenigo 6/a, Padova, Italy
Received 25 April 2002; accepted 24 May 2002
A glottal model based on physical constraints is proposed. The model describes the vocal fold as a simple oscillator, i.e. a damped
mass-spring system. The oscillator is coupled with a nonlinear block, accounting for fold interaction with the airflow. The nonlinear
block is modelled as a regressor-based functional with weights to be identified, and a pitch-synchronous identification procedure
is outlined. The model is used to analyse voiced sounds from normal and from pathological voices, and the application of the
proposed analysis procedure to voice quality assessment is discussed. 2002 IPEM. Published by Elsevier Science Ltd. All
rights reserved.
Keywords: Nonlinear models of vocal emission; Physical models; Estimation and modelling of the glottal flow; Nonlinear identification; Voice
quality assessment
PACS: 43.70.Bk; 43.70.Dn
1. Introduction
Many of the acoustic and perceptual features of an


Source: Avanzini, Federico - Department of Information Engineering, Universitą degli Studi di Padova


Collections: Computer Technologies and Information Sciences