Redistribution of the low frequency acoustic modes of a room: A finite element-based optimisation method

Papadopoulos, CI

dc.contributor.author	Papadopoulos, CI	en
dc.date.accessioned	2014-03-01T01:17:00Z
dc.date.available	2014-03-01T01:17:00Z
dc.date.issued	2001	en
dc.identifier.issn	0003682X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14318
dc.subject	Energy Distribution	en
dc.subject	Finite Element	en
dc.subject	Finite Element Analysis	en
dc.subject	Quality Improvement	en
dc.subject	Low Frequency	en
dc.subject.other	Finite element method	en
dc.subject.other	Optimization	en
dc.subject.other	Walls (structural partitions)	en
dc.subject.other	Orthogonal rooms	en
dc.subject.other	Structural analysis	en
dc.title	Redistribution of the low frequency acoustic modes of a room: A finite element-based optimisation method	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0003-682X(01)00002-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0003-682X(01)00002-0	en
heal.publicationDate	2001	en
heal.abstract	This paper presents a method to redistribute the acoustic modes of a room in the low frequency range. The relationship between the acoustic modes and the room geometry is studied. The fundamental problem of normalizing the acoustic modes of a simple, orthogonal room is examined in depth. Several variable local geometric modifications of the room walls are introduced and an optimisation procedure is developed, based on finite element analysis. This procedure is used for the calculation of the exact magnitude of the geometric modifications that will lead to smoother mode and consequently, smoother sound energy distribution in the frequency range of interest. The sound quality improvement of the modified room in the low frequency range with respect to ISO recommendations is verified. This work opens up the possibility of constructing acoustic laboratories with extended suitability to perform acoustic measurements in the low frequency range. © 2001 Published by Elsevier Science Ltd. All rights reserved.	en
heal.journalName	Applied Acoustics	en
dc.identifier.doi	10.1016/S0003-682X(01)00002-0	en
dc.identifier.volume	62	en
dc.identifier.issue	11	en
dc.identifier.spage	1267	en
dc.identifier.epage	1285	en