As explained by the Audio Engineering Society:

Audio Forensics refers to engineering and scientific analysis, evaluation and presentation of audio and acoustic evidence in a judicial inquiry normally leading towards a presentation in court. The complex challenges faced by the field transcend borders and jurisdictions, and becomes increasingly complex with the proliferation of new types of digital media. In order to establish a reliable scientific basis for the procedures and analysis of the outcomes of audio forensic analysis, the technical committee meets at AES conventions to plan conferences, workshops and tutorials; to encourage dissemination of scientific information through peer-reviewed journal and conference publications and posters; and to communicate educational opportunities in the field.

Audio Engineering Society

What is Audio Forensics?