Experiments with Two Forensic Automatic Speaker Comparison Systems Using Reference Populations that (Mis)Match the Test Language

van der Vloed D, Jessen M, Gfroerer S. Experiments with Two Forensic Automatic Speaker Comparison Systems Using Reference Populations that (Mis)Match the Test Language. In: AES Conference: 2017 AES International Conference on Audio Forensics. Audio Engineering Society; 2017. Paper 2-1. Available from: https://aes.org/publications/elibrary-page/?id=18743

@inproceedings{vanderVloed2017_18743,
  author = {van der Vloed, David and Jessen, Michael and Gfroerer, Stefan},
  title = {{Experiments with Two Forensic Automatic Speaker Comparison Systems Using Reference Populations that (Mis)Match the Test Language}},
  booktitle = {AES Conference: 2017 AES International Conference on Audio Forensics},
  note = {Paper 2-1},
  year = {2017},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18743}
}

TY  - CPAPER
TI  - Experiments with Two Forensic Automatic Speaker Comparison Systems Using Reference Populations that (Mis)Match the Test Language
AU  - van der Vloed, David
AU  - Jessen, Michael
AU  - Gfroerer, Stefan
T2  - AES Conference: 2017 AES International Conference on Audio Forensics
M1  - Paper 2-1
SP  - 1
PY  - 2017
DA  - 2017/06/06
UR  - https://aes.org/publications/elibrary-page/?id=18743
PB  - Audio Engineering Society
LA  - en
AB  - Experiments were conducted, using two Forensic Automatic Speaker Comparison-systems (FASC), in which the language spoken in the Reference Population (RP) matches or mismatches the language spoken by perpetrator and suspect in a corpus of same-source and different-source pairs from NFI-FRITS. The LLRs are generally higher under mismatch between test and RP than under match (right-shift-effect). The existence and magnitude of this pattern varies depending on the test language, the automatic system, and on whether the same-source or the different-source distribution is examined. Possible explanations of the findings and practical implications for forensic casework, are discussed. It is argued that FASC can be applied in casework with language-mismatching RPs, but the right shift effect has to be taken into account.
ER  -