Set Absorption Coefficients

Class: kwave.toolbox.AcousticSolver Package: kwave.toolbox

Compute and assign the coefficients tau and eta in the fractional laplacian loss.

Syntax

setAbsorptionCoefficients(obj)

Description

Compute and assign the coefficients tau and eta in the fractional, assigns values as given by the formula in:

Treeby, Bradley E., and Ben T. Cox.
   "Modeling power law absorption and dispersion for acoustic propagation using the fractional Laplacian."
   The Journal of the Acoustical Society of America 127.5 (2010): 2741-2748.

If no dispersion, problem reduces with eta=0. If no absorption, problem reduces with tau=0. 'noDispersion' or 'noAbsorption' or 'on' must be declared by setting AcousticSolver.absorptionType. If absorptionPower=0, 2, problem reduces.

obj.prevTimeStep, the k-space correction is adjusted to account for the change in time step.

Input Arguments

None