Forensic Linguistic Inquiry into the Validity of F0 as Discriminatory Potential in the System of Forensic Speaker Verification
Susanto Susanto, Wang Zhen-hua, Wang Yingli, Deri Sis Nanda · 2020
In the provision of linguistic evidence as one of the foci in Forensic Linguistics, Forensic Speaker Verification (FSV) includes an analysis of speech recordings to verify the voice of a criminal. As an inquiry into the validity of the available FSV, we present the analysis on Indonesian FSV system. The system consists of pairing, tagging, acoustic features extraction, and statistical analysis. There is a claim that the system meets the demand for presenting legal evidence in Indonesian court. In the system, one of the acoustic features extracted from the speech data is fundamental frequency (F0). Then, the paper aims at reviewing the method in Indonesian FSV system in terms of fundamental frequency (F0) used as the discriminatory potential. The results show that F0 has not represented an adequate interpretation of the linguistic evidence in our experimental data. It leads us to suggest that more experimental studies are required to scrutinize F0 in the system.