ASOL, Lab, Opt
Specifies the acoustic solver with scattered field
   formulation.
LabAcoustic solver specification (no default):
SCAT  | —  | Set acoustic solver to the scattered field formulation.  | 
OptOption identifying an acoustic solver status:
OFF  | —  | Deactivate the specified acoustic solver (default).  | 
ON  | —  | Activate the specified acoustic solver.  | 
Use the ASOL command to activate the specified acoustic solution process.
The scattered option (Lab = SCAT)
sets the acoustic solver to the scattered-pressure field formulation. 
Issue the AWAVE command to define the incident
pressure pinc. If the AWAVE command is defined with Opt2 = INT, the
acoustic solver is set to the scattered field formulation regardless
of the ASOL command issued.