Sound absorption by perforated walls along boundaries
Loading...
Date
2020-06-03
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
We analyze the Helmholtz equation in a complex domain.
A sound absorbing structure at a part of the boundary is modelled
by a periodic geometry with periodicity ε > 0. A resonator volume
of thickness ε is connected with thin channels (opening ε^3) with the
main part of the macroscopic domain. For this problem with three
different scales we analyze solutions in the limit ε → 0 and find that
the effective system can describe sound absorption.
Description
Table of contents
Keywords
Helmholtz equation, sound absorbers, homogenization, complex domain