Verification of an Acoustic 3D BEM with Visco-Thermal Losses

Peter Møller Juhl, Vicente Cutanda Henriquez

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Sound waves propagating in the interior of devices such as acoustic transducers, hearing aids and mobile
phones undergo a significant amount of losses due to viscous and thermal effects. In some cases like
microphones, the performance of the device even relies on controlling these loss mechanisms.
A newly implemented three-dimensional Boundary Element Method with visco-thermal losses will be tested
in this work using a number of cases, including idealized setups with analytical solutions and actual
measurements on existing devices.
In particular, measurement microphones will be used as test cases. These devices are challenging due to the
high degree of coupling between diaphragm, internal gap, back cavity and external medium. In this work they
are modeled using a coupled FEM-BEM model, where the Finite Element Method is used on the diaphragm.
Original languageEnglish
Title of host publicationProceedings Internoise 2013 : Noise Control for Quality of Life
Number of pages7
Publication date15 Sep 2013
Publication statusPublished - 15 Sep 2013
Externally publishedYes

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