Acoustics and Waves in Fluids

Have the basic knowledge in acoustics and wave propagation in fluids

I Acoustics

1. Sound waves as linear perturbations of fluid mechanics equations.
2. Sourd perception : deciBels, weighting curves.
3. Wave propagation equations ; acoustic energy and intensity. Description in the frequency domain ; Helmholtz equation.
4. Plane and spherical waves ; characteristic impedance; near field, far field.
5. Reflection of waves at interfaces. Notion of impedance,
6. Sound radiation from vibrating structures. Integral formulation.

II Waves in fluids

1. Dispersive waves with the example of surface gravity waves,
2. Propagation of a wave packet, phase velocity, group velocity, dispersion relation.
3. High-frequency approximation and ray-tracing.

TP on acoustic materials. BE on the design of a muffler.