The structural material properties are as follows:
| Property | Backplate | Membrane |
| Young's Modulus (MPa) | 2.7E5 | 1.69E5 |
| Poisson's Ratio | 0.066 | 0.066 |
| Density (kg/m3) | 2329 | 2329 |
| Constant Damping Coefficient | 0.04 | 0.04 |
| Coefficient of Thermal Expansion (°C-1) | 1E-6 | 1E-6 |
The acoustic material properties are as follows:
| Property | Air Gap | Sound Port and Housing Cavity |
| Density (kg/m3) | 1.2041 | 1.2041 |
| Speed of Sound (m/s) | 343.24 | 343.24 |
| LRF Model[a] - Thin Layer Thickness | –- | 2.2 μm |
[a] The interaction between an acoustic pressure wave in a viscous fluid and a rigid wall is taken into account for specific structures according to the low reduced frequency (LRF) approximation.
The LRF model is defined (TB,AFDM) with the thin-layer option:
TB,AFDM,MATID,,,THIN
TBDATA,1,2.2E-06The electrostatic-structural material properties are as follows:
| Property | Air Gap |
| Young's Modulus (MPa) | 1E-6 |
| Poisson's Ratio | 0 |
| Density (kg/m3) | 0 |
| Relative Electric Permittivity | 1 |