  We present a technique to construct a spectropolarimetrically accurate
magneto-hydrostatic model of a large-scale solar magnetic field concentration,
mimicking a sunspot. Using the constructed model we perform a simulation of
acoustic wave propagation, conversion and absorption in the solar interior and
photosphere with the sunspot embedded into it. With the $6173\mathrm{\AA}$
magnetically sensitive photospheric absorption line of neutral iron, we
calculate observable quantities such as continuum intensities, Doppler
velocities, as well as full Stokes vector for the simulation at various
positions at the solar disk, and analyse the influence of non-locality of
radiative transport in the solar photosphere on helioseismic measurements.
Bisector shapes were used to perform multi-height observations. The differences
in acoustic power at different heights within the line formation region at
different positions at the solar disk were simulated and characterised. An
increase in acoustic power in the simulated observations of the sunspot umbra
away from the solar disk centre was confirmed as the slow magneto-acoustic
wave.
