Audibility of dispersion error in room acoustic finite-difference time-domain simulation as a function of simulation distance

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Saarelma, Jukka
dc.contributor.author Botts, Jonathan
dc.contributor.author Hamilton, Brian
dc.contributor.author Savioja, Lauri
dc.date.accessioned 2016-10-12T11:10:54Z
dc.date.issued 2016-04-01
dc.identifier.citation Saarelma , J , Botts , J , Hamilton , B & Savioja , L 2016 , ' Audibility of dispersion error in room acoustic finite-difference time-domain simulation as a function of simulation distance ' JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA , vol 139 , no. 4 , pp. 1822-1832 . DOI: 10.1121/1.4945746 en
dc.identifier.issn 0001-4966
dc.identifier.issn 1520-8524
dc.identifier.other PURE UUID: a138d132-6543-4f18-aa9c-390e77737ed1
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/audibility-of-dispersion-error-in-room-acoustic-finitedifference-timedomain-simulation-as-a-function-of-simulation-distance(a138d132-6543-4f18-aa9c-390e77737ed1).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=84966430238&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/6753217/Audibility_of_dispersion.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/22763
dc.description.abstract Finite-difference time-domain (FDTD) simulation has been a popular area of research in room acoustics due to its capability to simulate wave phenomena in a wide bandwidth directly in the time-domain. A downside of the method is that it introduces a direction and frequency dependent error to the simulated sound field due to the non-linear dispersion relation of the discrete system. In this study, the perceptual threshold of the dispersion error is measured in three-dimensional FDTD schemes as a function of simulation distance. Dispersion error is evaluated for three different explicit, non-staggered FDTD schemes using the numerical wavenumber in the direction of the worst-case error of each scheme. It is found that the thresholds for the different schemes do not vary significantly when the phase velocity error level is fixed. The thresholds are found to vary significantly between the different sound samples. The measured threshold for the audibility of dispersion error at the probability level of 82% correct discrimination for three-alternative forced choice is found to be 9.1 m of propagation in a free field, that leads to a maximum group delay error of 1.8 ms at 20 kHz with the chosen phase velocity error level of 2%. en
dc.format.extent 11
dc.format.extent 1822-1832
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA en
dc.relation.ispartofseries Volume 139, issue 4 en
dc.rights openAccess en
dc.subject.other Acoustics and Ultrasonics en
dc.subject.other Arts and Humanities (miscellaneous) en
dc.subject.other 113 Computer and information sciences en
dc.title Audibility of dispersion error in room acoustic finite-difference time-domain simulation as a function of simulation distance en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Mediatekniikan laitos
dc.contributor.department Department of Computer Science en
dc.subject.keyword Acoustics and Ultrasonics
dc.subject.keyword Arts and Humanities (miscellaneous)
dc.subject.keyword 113 Computer and information sciences
dc.identifier.urn URN:NBN:fi:aalto-201610124802
dc.identifier.doi 10.1121/1.4945746
dc.type.version publishedVersion


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