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For Plane wave (monochromatic) enter a value for the Pressure amplitude p0 of the wave, select the Speed of sound as User defined (enter a value for c) or From material, enter a Wave direction vector ek, enter the Signal frequency f0 of the wave, and a possible Phase .
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For Modulated Gaussian pulse enter a value for the Pressure amplitude p0 of the wave, select the Speed of sound as User defined (enter a value for c) or From material, enter a Wave direction vector ek and enter the Signal emitting plane coordinate x0. The latter two options define the initial location of the pulse and the propagation direction. When modeling scattering problems, the initial location should be placed outside the computational domain. Next define the frequency content of the Gaussian pulse. Select the Gaussian pulse bandwidth as Full width at half maximum, power (the default), Full width at half maximum, amplitude, Full duration at half maximum, power, Full duration at half maximum, amplitude, or Standard deviation. For the first two options enter a frequency bandwidth Δf and for the latter a time window Δt. Finally, enter the carrier Signal frequency (for time dependent studies) f0.
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For User defined enter an analytical expression that can be a function of both space and time or use a solution from a previous study.
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