If you choose Incident Wave Source, Planar Wave, you can define a pressure to send a Planar Wave into your domain.nBut maybe a Monopole is more appropriate, which will send a Spherical Wave into your domain.nYou can also choose Loudspeaker.nIf you say more about how that load is known, what created that pressure, how was it measured? What is the shape of the domain, what are the boundary conditions on that domain?.nn n