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Journal Article

Applications of ENF Analysis in Forensic Authentication of Digital Audio and Video Recordings

Authors: Grigoras, Catalin

Journal of the Audio Engineering Society · Volume 57 · Issue 9 · pp. 643–661 · September 2009

Abstract

Small frequency variations in the electrical power network, which are the same through the area serviced by the network, can be used to assess the integrity of audio and video evidence. Small amounts of hum usually leak into a recording, and this provides a unique time signature. By archiving power line frequencies over many years, the time of a recording can be determined by comparing it to the information in the archive database. Similarly, discontinuities in hum frequency or multiple frequency components provide additional forensic evidence.

Details

Publication
Journal of the Audio Engineering Society
Volume
57
Issue
9
Pages
643–661
Publication date
September 6, 2009
Affiliation
Bucharest S1, Romania (See document for exact affiliation information.)
Type
Journal Article