Revision as of 09:37, 6 June 2010 edit The Anome (talk \| contribs) Edit filter managers, Administrators 260,110 edits dab Watergate ← Previous edit		Revision as of 09:37, 6 June 2010 edit undo The Anome (talk \| contribs) Edit filter managers, Administrators 260,110 edits '''Electrical network frequency''' ('''ENF''') '''analysis''' Next edit →
Line 4: <!-- End of AfD message, feel free to edit beyond this point --> '''Electrical network frequency''' ('''ENF''') '''analysis''' is a [[forensic science]] technique for validating [[audio recording]]s by comparing frequency changes in background [[mains hum]] in the recording with long-term high-precision historical records of [[mains frequency]] changes from a database.<ref>{{cite web\|url=http://www.diamondcut.com/Downloads/AppNote4DiamondCut.pdf\|title=Digital Audio Recording Analysis: The Electric Network Frequency Criterion\|author=Catalin Grigoras\|publisher=Diamond Cut Productions, Inc}}</ref> In effec the mains hum signal is treated as if it was a time-dependent [[digital watermark]] that can be used to identify the time at which the recording was created, and to help detect any edits in the sound recording.<ref> Cooper, A.J: {{cite web\|url=http://www.aes.org/e-lib/browse.cfm?elib=14411\|title=The electric network frequency (ENF) as an aid to authenticating forensic digital audio recordings – an automated approach}}, Conference paper, AES 33rd International Conference, USA (2008)</ref>

Electrical network frequency analysis: Difference between revisions