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An empirical estimate of the precision of likelihood ratios from a forensic-voice-comparison system

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dc.contributor.authorMorrison, Geoffrey
dc.contributor.authorZhang, Cuiling
dc.contributor.authorRose, Philip
dc.date.accessioned2015-12-10T22:40:58Z
dc.date.issued2011
dc.date.updated2016-02-24T08:28:22Z
dc.description.abstractAn acoustic-phonetic forensic-voice-comparison system was constructed using the time-averaged formant values of tokens of 61 male Chinese speakers' /i/, /e/, and /a/ monophthongs as input. Likelihood ratios were calculated using a multivariate kernel density formula. A separate set of likelihood ratios was calculated for each vowel phoneme, and these were then fused and calibrated using linear logistic regression. The system was tested via cross-validation. The validity and reliability of the results were assessed using the log-likelihood-ratio-cost function (Cllr, a measure of accuracy) and an empirical estimate of the credible interval for the likelihood ratios from different-speaker comparisons (a measure of precision). The credible interval was calculated on the basis of two independent pairs of samples for each different-speaker comparison pair.
dc.identifier.issn0379-0738
dc.identifier.urihttp://hdl.handle.net/1885/57680
dc.publisherElsevier
dc.sourceForensic Science International
dc.subjectKeywords: accuracy; acoustic phonetic forensic voice comparison system; article; calculation; Chinese; forensic science; human; likehood ratio; logistic regression analysis; phoneme; priority journal; reliability; speech; statistical analysis; validity; voice; Adul Accuracy; Credible interval; Forensic voice comparison; Precision; Reliability; Validity
dc.titleAn empirical estimate of the precision of likelihood ratios from a forensic-voice-comparison system
dc.typeJournal article
local.bibliographicCitation.startpage7
local.contributor.affiliationMorrison, Geoffrey, College of Arts and Social Sciences, ANU
local.contributor.affiliationZhang, Cuiling, College of Arts and Social Sciences, ANU
local.contributor.affiliationRose, Philip, College of Arts and Social Sciences, ANU
local.contributor.authoruidMorrison, Geoffrey, u4479616
local.contributor.authoruidZhang, Cuiling, u4506248
local.contributor.authoruidRose, Philip, u7901212
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor170204 - Linguistic Processes (incl. Speech Production and Comprehension)
local.identifier.ariespublicationf2965xPUB411
local.identifier.citationvolumeOnline 2010
local.identifier.doi10.1016/j.forsciint.2010.11.001
local.identifier.scopusID2-s2.0-79955463066
local.type.statusPublished Version

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