|Chair:||Jeff M. Smith||Send Email|
|Vice Chair:||Eddy Bogh Brixen||Send Email|
|Forum:||Committee Discussion Forum|
The recent AES International Conference on Audio Forensics, held June 18-20, 2019 in Porto, Portugal was a huge success. Thanks to all involved for a wonderful event. Details can be found here: http://www.aes.org/conferences/2019/forensics/.
Proceedings from this conference and all previous audio forensics conferences (26, 33, 39, 46, 54, 2017) are available here: http://www.aes.org/publications/conferences/. This includes the selection for the Best Paper Award named for conference Platinum Sponsors CEDAR Audio and Oxford Wave Research: "Inverse Decoding of PCM A-law and µ-law" by Luca Cuccovillo and Patrick Aichroth.
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. Presently, the technical committee meetings for audio forensics are open to all attendees.
Last updated: 10/31/2015
General Considerations -
Forensic audio has important applications in law and investigations. These continue to grow as the ability to record and share digital media proliferates. Therefore, it is important for the practitioner working with forensic audio to be trained in and apply processes related to proper evidence handling and laboratory procedures. Analog audio evidence, once commonly cassette and micro-cassette tapes, make up an increasingly small percentage of cases. As such, digital audio evidence, which in practice is closely related to and often times generated by computer forensics investigations, requires handling practices such as imaging physical digital media, hashing file duplicates, authenticating recordings, and recovering and/or repairing corrupt or carved files.
Modern challenges for the forensic audio examiner have expanded to include dealing with evidence from social networks and sharing websites such as YouTube and Facebook. These pose unique challenges in attributing provenance due to processing applied automatically by the hosting site. Additionally, growing concern for privacy rights has led citizens and providers of Internet services to question authorities law enforcement entities have in requesting and accessing digital media hosted on these sites. Similarly, mobile phone manufacturers have adopted policies and operating system designs resistant to collection of probative material and using "backdoor" access to password protected devices. As social media awareness and use continue to evolve, so will public and commercial policies related to privacy rights.
The use of probabilistic methods in the presentation of scientific evidence is of increasing interest to the forensic sciences as a whole. As a result, we anticipate seeing the integration of methods and techniques in forensic audio employed within a probabilistic framework such as Bayesian likelihood, which enjoys application in forensic speaker comparison.
Difficulty in the area of audio enhancement continues due to lossy data compression common in small digital recorders, data compression and bandwidth limited signals in telecommunications, and non-ideal recording environments common to surveillance and security. In the presence of heavy data compression, classical algorithm designs for noise reduction filters are challenged and thereby require that new techniques to be developed.
AES Technical Committee on Audio Forensics -
Numerous papers on audio forensics appear in the Journal of AES and are presented at AES Conventions each year. Additionally, there have been 6 AES Conferences on Audio Forensics: 2005, 2008, 2010, 2012, 2014, 2017. The next conference is being considered for 2019. Additionally, regular workshops and tutorials organized by the TC-AF exploring these and many other emerging trends appear at AES Conventions in the US and Europe each year.
These documents do not necessarily express the official position of the AES on the issues discussed at these meetings, and only represent the views of committee members participating in the discussion. Any unauthorized use of these publications is prohibited. Authorization must be obtained from the Executive Director of the AES: Email, Tel: +1 212 661 8528, Address: 551 Fifth Ave., Suite 1225, New York, New York 10176, USA.
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