DEFINITION:

Activity on internal noise prediction consists of the development, improvement and validation of experimental and numerical methods for the prediction and the reduction of internal noise (aeroplane, helicopter, launcher). This activity is a part of the Vibration and Vibroacoustic domain. To solve an Internal Noise Problem, we need the knowledge of the excitation sources, the dynamic behaviour of the structure, the propagation way of the vibration in the structure and in the internal fluid.

(Source: ACARE Domain 210)

SUBDOMAINS:

1. Material properties: Homogeneous material, heterogeneous structure, Composite material, viscoelastic media, multilayer, etc., Acoustic material, porous material, Material optimisation.
2. Modelling: Analytical approaches, Finite element analysis, Boundary Element Analysis, Statistic Energy Analysis, Energy diffusion;
3. Excitation sources: mechanic, aerodynamic, acoustic; Acoustic propagation, Acoustic radiation, Acoustic transmission through structures, Acoustic reflection from elastics structures.
4. Experimental Identification.