An acoustical plane wave, much like a light source, displays diffraction patterns based on the object it encounters (slits, shapes, objects, etc.). A sphere is one such object of particular interest, as the diffraction pattern produced by a sphere can be used to deconstruct sound signals on the surface of the sphere (a signal which would otherwise be nonsense because of the diffraction). Spheres have been increasingly used in recent years as the basic geometry of microphone arrays, and they offer many advantages over, for example, linear microphone arrays. The project will therefore focus on modelling and visually displaying diffraction of an acoustic wave due to a sphere, and will (hopefully) delve into spherical harmonic decomposition of the sound field on the sphere.
Are you looking at what happens to the sound as it strikes the sphere or in the far field after it has been diffracted. Is the sound being diffracted or refracted? How can you tell the difference?