Transient sound generation of a plate coupled to an acoustic cavity

Pierre-Olivier Mattei (1) , Ulf R Kristiansen (2)

1 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
2 NTNU Acoustics Research Center

The sound radiated into a cavity by the surrounding walls depends on several factors. The signal type, wall construction, cavity geometry and damping are of the most important. In this paper results that illustrate many of the basic features of vibro-acoustic coupling in the transient regime are presented. One shows that the efficiency by which the plate radiates sound into the room can in general qualitatively be explained by the speed of the Fourier frequency components of the impulse type signal. Subsonic phase velocities generate a near acoustic field, and only transfer acoustic energy to the room from the region close to the plate boundaries. For supersonic bending wave speeds energy is transferred to the room all along the trajectory.

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

Pierre-Olivier Mattei, Ulf R Kristiansen. Transient sound generation of a plate coupled to an acoustic cavity. CFA/DAGA'04, Mar 2004, Strasbourg, France. pp.315-316. ⟨hal-00088515⟩