177	1996	Bo Strand	bo@tdb.uu.se	Simulations of Acoustic Wave Phenomena using High-Order Finite Difference Approximations

			Abstract
Numerical studies of hyperbolic initial boundary value problems (IBVP)
in several space dimensions have been performed using high-order finite
difference approximations. It is shown that for wave
propagation problems where the wavelengths are small compared to the
domain and long time integrations are needed high-order schemes are
superior to low-order ones. In fact, in two dimensions an
acoustic lens is simulated leading to large scale computations where
high-order methods and powerful parallel computers are necessary if an
accurate solution is to be obtained.