Authors: Donato, Patrizia
Lamacz, Agnes
Schweizer, Ben
Title: Sound absorption by perforated walls along boundaries
Language (ISO): en
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.
Subject Headings: Helmholtz equation
sound absorbers
complex domain
Issue Date: 2020-06-03
Appears in Collections:Schweizer, Ben Prof. Dr.
Preprints der Fakultät für Mathematik

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