Seuils d'instabilité d'un instrument de musique à anche simple : approche modale

Fabrice Silva (1) , Jean Kergomard (1)

1 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]

Many musical instruments, as for example woodwind instruments, flute or violins, are self-sustained oscillating systems, i.e. musician enacts as a continuous energy source to drive an oscillation in the passive resonator, the body of the instrument, by means of a nonlinear coupling. For single reed instruments like clarinet, there exists a minimal value of mouth pressure beyond which sound can appear. This paper deals with the analysis of this oscillation threshold, calculated using a modal decomposition of the resonator, in order to have a better comprehension of how reed characteristics, such as its strength and its damping, may influence the attack transient of notes.

Mots clés: acoustique musicale; décomposition modale; seuil d'oscillation

Domaines: Acoustique [physics.class-ph]; Acoustique [physics.class-ph]

Fabrice Silva, Jean Kergomard. Seuils d'instabilité d'un instrument de musique à anche simple : approche modale. CFM 2007 - 18ème Congrès Français de Mécanique, Aug 2007, Grenoble, France. CD-ROM(6 p.). ⟨hal-00226405⟩