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

Philip Rose

    Research output: Contribution to conferencePaper

    Abstract

    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 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.
    Original languageEnglish
    Pages4819-4823
    DOIs
    Publication statusPublished - 2015
    EventInternational Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015 - South Brisbane, QLD
    Duration: 1 Jan 2015 → …

    Conference

    ConferenceInternational Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015
    Period1/01/15 → …

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