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

Morrison, Geoffrey; Zhang, Cuiling; Rose, Philip


An 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...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Forensic Science International
DOI: 10.1016/j.forsciint.2010.11.001


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