Skip navigation
Skip navigation

Spherical harmonics based generalized image source method for simulating room acoustics

Samarasinghe, Prasanga; Abhayapala, Thushara; Chen, Hanchi; Dickins, Glenn

Description

Allen and Berkley's image source method (ISM) is proven to be a very useful and popular technique for simulating the acoustic room transfer function (RTF) in reverberant rooms. It is based on the assumption that the source and receiver of interest are both omnidirectional. With the inherent directional nature of practical loudspeakers and the increasing use of directional microphones, the above assumption is often invalid. The main objective of this paper is to generalize the frequency domain...[Show more]

dc.contributor.authorSamarasinghe, Prasanga
dc.contributor.authorAbhayapala, Thushara
dc.contributor.authorChen, Hanchi
dc.contributor.authorDickins, Glenn
dc.date.accessioned2021-08-19T05:22:32Z
dc.identifier.issn0001-4966
dc.identifier.urihttp://hdl.handle.net/1885/244044
dc.description.abstractAllen and Berkley's image source method (ISM) is proven to be a very useful and popular technique for simulating the acoustic room transfer function (RTF) in reverberant rooms. It is based on the assumption that the source and receiver of interest are both omnidirectional. With the inherent directional nature of practical loudspeakers and the increasing use of directional microphones, the above assumption is often invalid. The main objective of this paper is to generalize the frequency domain ISM in the spherical harmonics domain such that it could simulate the RTF between practical transducers with higher-order directivity. This is achieved by decomposing transducer directivity patterns in terms of spherical harmonics and by applying the concept of image sources in spherical harmonics based propagation patterns. Therefore, from now on, any transducer can be modeled in the spherical harmonics domain with a realistic directivity pattern and incorporated with the proposed method to simulate room acoustics more accurately. We show that the proposed generalization also has an alternate use in terms of enabling RTF simulations for moving point-transducers inside pre-defined source and receiver regions.
dc.description.sponsorshipThanks to Australian Research Council Linkage Grant funding scheme (Project No. LP160100379).
dc.publisherAcoustical Society of America
dc.rights© 2018 Acoustical Society of America
dc.sourceJournal of the Acoustical Society of America
dc.titleSpherical harmonics based generalized image source method for simulating room acoustics
dc.typeJournal article
local.description.notesAdded manually as didn't import from ARIES
local.identifier.citationvolume144
dcterms.dateAccepted2018-08-22
dc.date.issued2018-09-13
local.identifier.ariespublicationu4485658xPUB138
local.publisher.urlhttps://asa.scitation.org/
local.type.statusAccepted Version
local.contributor.affiliationSamarasinghe, Prasanga, College of Engineering and Computer Science, ANU
local.contributor.affiliationAbhayapala, Thushara, College of Engineering and Computer Science, ANU
local.contributor.affiliationChen, Hanchi, College of Engineering and Computer Science, ANU
local.contributor.affiliationDickins, Glenn, Dolby Australia
dc.relationhttp://purl.org/au-research/grants/arc/LP160100379
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage1381
local.bibliographicCitation.lastpage1391
local.identifier.doi10.1121/1.5053579
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/4049..."The Accepted Version can be archived in a Non-Commercial Institutional Repository. 6 months embargo" from SHERPA/RoMEO site (as at 14/12/2021). Copyright (2018) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.
CollectionsANU Research Publications



Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  17 November 2022/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator