Wideband acoustic modulation using periodic poroelastic composite structures

TL;DR

This paper introduces a novel wideband acoustic modulation method using periodic poroelastic composite structures that combine porous materials and resonators for effective sound insulation across a broad frequency range.

Contribution

The study develops and validates a theoretical and numerical model for wideband acoustic modulation using porous-lined resonator structures, demonstrating improved sound insulation capabilities.

Findings

Effective sound insulation achieved across wide frequency range

Theoretical results align with finite element simulations

Porous and resonant design enhances low-frequency noise control

Abstract

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.