Abstract：
:In a 2017 New South Wales case, a forensic practitioner conducted a forensic voice comparison using a Gaussian mixture model - universal background model (GMM-UBM). The practitioner did not report the results of empirical tests of the performance of this system under conditions reflecting those of the case under investigation. The practitioner trained the model for the numerator of the likelihood ratio using the known-speaker recording, but trained the model for the denominator of the likelihood ratio (the UBM) using high-quality audio recordings, not recordings which reflected the conditions of the known-speaker recording. There was therefore a difference in the mismatch between the numerator model and the questioned-speaker recording versus the mismatch between the denominator model and the questioned-speaker recording. In addition, the practitioner did not calibrate the output of the system. The present paper empirically tests the performance of a replication of the practitioner's system. It also tests a system in which the UBM was trained on known-speaker-condition data and which was empirically calibrated. The performance of the former system was very poor, and the performance of the latter was substantially better.
journal_name
Forensic Sci Intjournal_title
Forensic science internationalauthors
Morrison GSdoi
10.1016/j.forsciint.2017.12.024subject
Has Abstractpub_date
2018-02-01 00:00:00pages
e1-e7eissn
0379-0738issn
1872-6283pii
S0379-0738(17)30540-6journal_volume
283pub_type
杂志文章abstract：:In this study it is demonstrated that human odor collected from items recovered at a post-blast scene can be evaluated using human scent specific canine teams to locate and identify individuals who have been in contact with the improvised explosive device (IED) components and/or the delivery vehicle. The purpose of th...
journal_title：Forensic science international
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journal_title：Forensic science international
pub_type： 杂志文章
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journal_title：Forensic science international
pub_type： 杂志文章
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更新日期：2021-01-01 00:00:00
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pub_type： 杂志文章
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更新日期：2004-02-10 00:00:00
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pub_type： 杂志文章
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更新日期：2021-01-01 00:00:00
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journal_title：Forensic science international
pub_type： 杂志文章
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更新日期：2001-02-15 00:00:00
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journal_title：Forensic science international
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journal_title：Forensic science international
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更新日期：2017-07-01 00:00:00
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pub_type： 杂志文章
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更新日期：1991-07-01 00:00:00
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journal_title：Forensic science international
pub_type： 杂志文章
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journal_title：Forensic science international
pub_type： 杂志文章
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更新日期：1993-06-01 00:00:00
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更新日期：2014-07-01 00:00:00
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pub_type： 杂志文章
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更新日期：2003-01-28 00:00:00
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pub_type： 杂志文章
doi：10.1016/j.forsciint.2004.09.127
更新日期：2005-10-29 00:00:00
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journal_title：Forensic science international
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更新日期：2016-08-01 00:00:00
