| Matrix or Vector | Shape Functions | Integration Points | 
|---|---|---|
| Fluid Stiffness and Mass Matrices | Equation 11–127 | 2 x 2 | 
| Coupling Stiffness, Mass, and Damping Matrices (fluid-structure interface) | Equation 11–120, Equation 11–121 , and Equation 11–127 specialized to the interface | 2 | 
Acoustics describes the derivation of acoustic element matrices and load vectors.