Examination of the Effect of a Sound Source Location on the Steady-State Response of a Two-Room Coupled System

In this paper, the computer modelling application based on the modal expansion
method is developed to study the influence of a sound source location on a steady-
state response of coupled rooms. In the research, an eigenvalue problem is solved
numerically for a room system consisting of two rectangular spaces connected to one
another. A numerical procedure enables the computation of shape and frequency of
eigenmodes, and allows one to predict the potential and kinetic energy densities in a
steady-state. In the first stage, a frequency room response for several source positions
is investigated, demonstrating large deformations of this response for strong and
weak modal excitations. Next, a particular attention is given to studying how the
changes in a source position influence the room response when a source frequency
is tuned to a resonant frequency of a strongly localized mode.