(a) Sketch of a vibrating source surface making noise in a semi-infinite acoustic domain in the presence of rigid objects; (b) Definition of the virtual acoustic volume Ω_v delimited by the virtual surface Σ_v, the vibrating source surface Σ_s and the envelops of the rigid objects Σ_o; (c) Localisation of measurement and identification patches and of measured pressure points inside the virtual acoustic volume; (d) Illustration of the Finite Element Model of the virtual acoustic volume (VAV) with Neumann Boundary Conditions.