Optoreflectometry determination of the resonance properties of a vocal fold.
A new method of measuring the resonance properties of a vocal fold using electromagnetic excitation and laser optoreflectometry for response monitoring is described. Two resonance peaks were experimentally identified with one magnet stuck on the vocal fold at frequencies F0(1m)=54.7 Hz and F0'(1m)=35.8 Hz. The addition of a second magnet allowed calculation of the actual viscoelastic properties of the vocal fold: F0=71.8 Hz; quality factor Q=8.03; mass m=0.057 g; stiffness k=11.6 Nm; and damping zeta=0.0032 Nm(-1). A numerical simulation of a two-layered model verified the experimental data.
Garrel
Renaud
R
Clinical and Experimental Audiology and Phonology Laboratory, UPRES-EA 2668, Marseille, France. r-garrel@chu-montpellier.fr
Nicollas
Richard
R
Giovanni
Antoine
A
Ouaknine
Maurice
M
D000818:Animals; D004548:Elasticity; D008954:Models, Biological; D013061:Speech Acoustics; D013552:Swine; D014732:Vibration; D014783:Viscosity; D014827:Vocal Cords / Q000502:physiology*