In addition to the density and speed of sound commonly needed for acoustics analysis using the Helmholtz equation, additional fluid properties are needed for viscothermal acoustics, e.g. dynamic/bulk viscosity and specific heat at constant pressure/volume. The properties are used in BLI and LRF methods to modify the base Helmholtz formulation with added terms for capturing viscothermal effects. The material properties used for all bodies in this example problem are listed below.