Jeffrey Zitelli developed a major demo enhancement for the FEniCS/dolfinx repository, focusing on Helmholtz plane-wave solutions in complex mode with mixed Dirichlet and Neumann boundary conditions. Using Python and leveraging expertise in the Finite Element Method and scientific computing, he consolidated code paths for real and complex modes within demo_helmholtz.py, improving maintainability and reducing duplication. The updated demo was aligned with acoustic scattering literature, enabling more realistic and reproducible demonstrations for both validation and educational purposes. This work demonstrated depth in numerical methods and addressed the need for clearer, literature-consistent examples in computational acoustics within dolfinx.