Sound absorption by a planar array of monopole-dipole scatterers

摘要

The scattering of a plain sound wave by an array of small monopole-dipole scatterers (Helmholtz resonators vibrating on small bars) is considered. It is shown that, at a certain friction in the resonators, an array whose spatial periods do not exceed the half-wavelength of sound serves as an efficient absorber for resonance-frequency sound.