Digital Audio Technology in Audio Forensic Investigation

AES Toronto

28 March 2006

On Tuesday 28th March 2006 at the Ryerson Rogers communication centre, the Toronto AES hosted a seminar by CEDAR's Managing Director, Gordon Reid, which covered many aspects of audio and its connections with modern forensic science.

Mr Reid demonstrated the use of single-channel and cross-channel adaptive filters, both independently and combined with other noise reduction processes. He also showed how a modern processing system supporting multiple, simultaneous real-time algorithms can perform complex noise reduction with appropriate processing chains for each job. Mr Reid then moved on to discuss the abuse of digital audio technology in the forensic arena, illustrating the dangers that such powerful signal processing can possess, and how its ability to edit audio without leaving traces or artefacts can be used to alter evidence. He finished the presentation by discussing possible areas of future research.

Mr Reid and Norman Verrell of HHB Canada (CEDAR's Canadian distributor) conducted demonstrations of the CEDAR Forensic System throughout the seminar.

For further information:

CEDAR Audio Limited, 20 Home End, Fulbourn, Cambridge, CB21 5BS, United Kingdom.
t: +44 1223 881771
f: +44 1223 881778

HHB Communications Canada Ltd, 260 King Street East, 5th Floor, Toronto, Ontario, M5A 4L5.
t: +1 416 867 9000
f: +1 416 867 1080