Regularization in global sound equalization based on effort variation

Stefanakis, N; Sarris, J; Jacobsen, F

dc.contributor.author	Stefanakis, N	en
dc.contributor.author	Sarris, J	en
dc.contributor.author	Jacobsen, F	en
dc.date.accessioned	2014-03-01T01:31:47Z
dc.date.available	2014-03-01T01:31:47Z
dc.date.issued	2009	en
dc.identifier.issn	0001-4966	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19926
dc.subject.classification	Acoustics	en
dc.subject.other	RECTANGULAR ROOMS	en
dc.subject.other	LOW-FREQUENCIES	en
dc.subject.other	ENCLOSURES	en
dc.subject.other	REPRODUCTION	en
dc.title	Regularization in global sound equalization based on effort variation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1121/1.3158926	en
heal.identifier.secondary	http://dx.doi.org/10.1121/1.3158926	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Sound equalization in closed spaces can be significantly improved by generating propagating waves that are naturally associated with the geometry, as, for example, plane waves in rectangular enclosures. This paper presents a control approach termed effort variation regularization based on this idea. Effort variation equalization involves modifying the conventional cost function in sound equalization, which is based on minimizing least-squares reproduction errors, by adding a term that is proportional to the squared deviations between complex source strengths, calculated independently for the sources at each of the two walls perpendicular to the direction of propagation. Simulation results in a two-dimensional room of irregular shape and in a rectangular room with sources randomly distributed on two opposite walls demonstrate that the proposed technique leads to smaller global reproduction errors and better equalization performance at listening positions outside of the control region compared to effort regularization and compared to a simple technique that involves driving groups of sources identically. (C) 2009 Acoustical Society of America. [DOI: 10.1121/1.3158926]	en
heal.publisher	ACOUSTICAL SOC AMER AMER INST PHYSICS	en
heal.journalName	JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA	en
dc.identifier.doi	10.1121/1.3158926	en
dc.identifier.isi	ISI:000269006800018	en
dc.identifier.volume	126	en
dc.identifier.issue	2	en
dc.identifier.spage	666	en
dc.identifier.epage	675	en