This test investigated the accuracy and consistency of voice identification comparisons made by 5 trained examiners over a three week period. These individuals were all students of the University of Colorado at Denver and had taken a semester long course in Audio Forensics with limited training in voice identification. Each week, examiners conducted 8 closed-trial comparisons of 4 clue-phrases from both male and female speakers. In simulating a closed set spectrographic line-up, each comparison consisted of spectrograms from a pool of 4 “known” speakers and one “unknown” speaker- audio recordings of the known and unknown speakers were made 9 months apart. From the pool of known speakers, the examiner made a positive identification match to the unknown. After the three week period, data reveled that examiners reached the same conclusion in all three examinations for only 50% of the comparisons. The average accuracy of these examinations was 65%. This paper discusses the outcome of the experiment including interpretation of these and other results.
Smith, Jeff M.
Affiliation: University of Colorado at Denver
AES Convention: 121 (October 2006) Paper Number: 6920
Publication Date: October 1, 2006
Subject: Measurements & Modeling
No AES members have commented on this paper yet.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.