Turbulence noise and aperiodicity in the pathologic voice. a multifactorial approach
Dejonckere, P.H.
Revue de Laryngologie - Otologie - Rhinologie 111(4): 353-357
1990
ISSN/ISBN: 0035-1334 PMID: 2281216 Document Number: 350628
A principal components analysis was performed on base of multiple measurements and evaluation scores in 72 patients with a hoarse voice. Two factors seem essential: the first one represents in some way the turbulent noise component, especially in higher frequencies (breathiness), while the second one rather accounts for the Fo-aperiodicity (harshness, roughness). Turbulent noise seems to be related with insufficient glottic closure. Aperiodicity mainly depends on mechanical instability of the oscillator. Both components are present to various extent in each patient, and proportion may change as a function of time.