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In Indonesia, some court cases involve speech recordings of suspects as legal evidence. In the courts, an expert is invited to explain for the verification to find out whether the speech recordings are spoken by the suspects or not. The task is called as Forensic Speaker Verification (FSV). It is one of the areas in the application for Forensic Linguistics as the provision of linguistic evidence [1]. FSV system includes an analysis of speech recordings to verify the voice of a criminal. In the system, fundamental frequency (F0) is one of the acoustic features which are extracted from the speech data [2]. Then, they are analyzed as the discriminatory potential. It is important to note that there is always a question in the context of human speech sound and its forensic relevance as an inquiry into its validity [3]. The critical question brings the requirement for always reviewing an available system in forensic speaker verification or identification. Later on, the review can be used for the improvement of the system. In line with that, the paper aims at reviewing the method in Indonesian FSV system in terms of the extracted acoustic feature of F0, which is used as the discriminatory potential. Method

Forensic Linguistic Inquiry into the Validity of F0 as Discriminatory Potential in the System of Forensic Speaker Verification