Assemble 1D acoustic finite-element matrices, apply boundary conditions, compare with analytical duct resonances and run an editable Python frequency-response model.

Compute beam section properties, estimate analytical cantilever bending frequencies, assemble a small Euler–Bernoulli FEM model and interpret damping and acoustic relevance.

Discretise a baffled vibrating plate into constant-velocity patches, evaluate a Rayleigh-integral pressure estimate and interpret radiation indicators such as coincidence frequency.

Construct direct and first-order reflected paths in a rectangular room, compute arrival times and estimate simple early-energy room-acoustic descriptors.

Assemble and solve a two-subsystem SEA loss-factor matrix, vary damping/coupling parameters and convert subsystem energy into averaged response quantities.

Choose suitable hybrid method combinations for multi-region acoustic problems and compare weak iterative coupling with a monolithic coupled reference.

Fit stiffness and damping from a synthetic frequency-response function, compute MAC/FRAC-style agreement measures and prepare a validation statement.