  We proposed an effective acoustic abatement solution comprised of periodic
resonators and multi-panel structures with porous lining, which incorporates
the wideband capability of porous materials and the low-frequency advantage of
locally resonant structures together. Theoretical model and numerical
implementation are developed and validated. Two-dimensional poroelastic field
expressions are used and resonator forces are incorporated. The results agree
well with those reported in the literature and the results obtained from the
finite element method. It turns out that sound insulation concerning both the
amplitude and tuning bandwidth can be achieved effectively using porous
additions and locally-resonant designs. This study presents a promising and
practical alternative for wideband acoustic modulation.
