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Forensic voice comparison with monophthongal formant trajectories - A likelihood ratio-based discrimination of 'schwa' vowel acoustics in a close social group of young Australian females

Rose, Philip

Description

An experiment is described relating to estimation of strength of evidence in likelihood ratio-based forensic voice comparison. It is asked whether a better performance is obtained from point estimation of formant pattern targets in monophthongal vowel acoustics rather than formant trajectories. The hypothesis is tested on non-contemporaneous recordings of a custom-built challenging database of 26 young Australian female voices performing a map task. Evaluation with the log likelihood ratio cost...[Show more]

dc.contributor.authorRose, Philip
dc.coverage.spatialSouth Brisbane, QLD
dc.date.accessioned2016-06-14T23:20:28Z
dc.date.createdApril 19 - 24, 2015
dc.identifier.isbn9781467369978
dc.identifier.urihttp://hdl.handle.net/1885/103394
dc.description.abstractAn experiment is described relating to estimation of strength of evidence in likelihood ratio-based forensic voice comparison. It is asked whether a better performance is obtained from point estimation of formant pattern targets in monophthongal vowel acoustics rather than formant trajectories. The hypothesis is tested on non-contemporaneous recordings of a custom-built challenging database of 26 young Australian female voices performing a map task. Evaluation with the log likelihood ratio cost validity metric Cllr shows that both trajectory and target perform well, but that contrary to phonological predictions, evidence based on monophthongal F-pattern trajectory is superior to target point measurements.
dc.publisherIEEE
dc.relation.ispartofseries40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015
dc.sourceICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
dc.titleForensic voice comparison with monophthongal formant trajectories - A likelihood ratio-based discrimination of 'schwa' vowel acoustics in a close social group of young Australian females
dc.typeConference paper
local.description.notesImported from ARIES
local.description.refereedYes
dc.date.issued2015
local.identifier.absfor200404 - Laboratory Phonetics and Speech Science
local.identifier.ariespublicationU3488905xPUB6788
local.type.statusPublished Version
local.contributor.affiliationRose, Philip, College of Asia and the Pacific, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage4819
local.bibliographicCitation.lastpage4823
local.identifier.doi10.1109/ICASSP.2015.7178886
dc.date.updated2016-06-14T08:49:23Z
local.identifier.scopusID2-s2.0-84946039929
CollectionsANU Research Publications

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