Control of sound transmission through an aperture using active sound absorption techniques: a theoretical investigation

摘要

We present a theoretical investigation of the operation of maximally absorbing absorbing sources deployed in, and near, a square aperture in a thin plane wall of infinite extent. Such a geo- metry models the usefulness of these maximal absorbing sources for preventing sound power transmission through an open window or similar opening. A coupled boundary element technique is used to calculate the acoustic propagation through the aperture. Three types of maximally absorbing sources are considered: a monopole, a dipole, and a monopole and dipole combination.