The spectrum of glottal flow models - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Acta Acustica united with Acustica Année : 2006

The spectrum of glottal flow models

Résumé

A unified description of the most-common glottal-flow models (KLGLOTT88, Rosenberg C, R++, LF) is proposed in the time domain, using a set of five generic glottal-flow parameters: fundamental period, maximum excitation, open quotient, asymmetry coefficient, and return-phase quotient. A unified set of time-domain equations is derived, and their analytical Laplace-transform computation leads to a set of frequency-domain equations. On the basis of this mathematical framework, the spectral properties of the glottal-flow models and their derivatives are studied. It is shown that any glottal-flow model can be described by a combination of low-pass filters, the cut-off frequencies and amplitudes of which can be expressed directly in terms of time-domain parameters. The spectral correlates of time-domain glottal-flow parameters are then explored. It is shown that the maximum excitation corresponds to a gain factor, and that it controls the mid-to-high-frequency spectral slope. A non-null return-phase quotient adds an additional spectral tilt in the high-frequency part of the glottal-flow spectrum. The open quotient and asymmetry coefficient are related to the low-frequency spectral peak, also called the glottal formant. The glottal-formant frequency is mainly controlled by the open quotient, and its amplitude (or bandwidth) by the asymmetry coefficient. As a direct application, it is shown that the amplitude difference between the first two harmonics, commonly assumed to be correlated to the open quotient, is also theoretically dependent on the asymmetry coefficient.
Fichier principal
Vignette du fichier
Doval_ActaAcustica_2006.pdf (842.94 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound1.wav (78.55 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound10.wav (368.62 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound11.wav (368.66 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound2.wav (70.67 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound3.wav (84.18 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound4.wav (84.28 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound5.wav (84.28 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound6.wav (368.62 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound7.wav (427.51 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound8.wav (368.62 Ko) Télécharger le fichier
ActaAcustica_doval_2006/sound9.wav (368.66 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-00368131 , version 1 (24-04-2020)

Identifiants

  • HAL Id : hal-00368131 , version 1

Citer

Boris Doval, Christophe d'Alessandro, Nathalie Henrich Bernardoni. The spectrum of glottal flow models. Acta Acustica united with Acustica, 2006, 92 (6), pp.1026-1046. ⟨hal-00368131⟩
351 Consultations
540 Téléchargements

Partager

Gmail Facebook X LinkedIn More