Question

How is helioseismology used to model the sun?

Answer 1

One can view the physical processes involved, in the same way that seismologists learn about the Earth's interior by monitoring waves caused by earthquakes.

Explanation:

Temperature, composition, and motions deep in the Sun influence the oscillation periods and yield insights into conditions in the solar interior.

The primary physics in both seismology and helioseismology are wave motions that are excited in the body's (Earth or Sun) interior and that propagate through a medium. However, there are many differences in number and type of waves for both terrestrial and solar environments.
http://soi.stanford.edu/results/heliowhat.html