In This Section
Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
Sound Board: Food for Thought, Aesthetics in Orchestra Recording - April 2015
Reflecting on Reflections - June 2014
AES Journal Forum
Electric Network Frequency Analysis for Forensic Audio
[Feature] Analysis of the electric network frequency (ENF) has rapidly emerged as a crucial tool in the armory of the forensic audio analyst. Traces of the ENF are often picked up on recordings, either by electromagnetic induction or acoustically, and these can be detected subsequently by analysts. It turns out that unique patterns in the frequency signature of power-line-related signals can be used to identify the time and place in which audio recordings might have been made. This is possible because some power grid companies keep records of the ENF in a database, against which forensic audio samples can be compared. Even if no such database is available, which is sometimes the case, analysis of residual traces of the ENF in a recording can be used to detect audio editing and other processes that might have been used to modify it. During the 46th International Conference, held recently in Denver, Colorado, a substantial number of the papers and posters were devoted to aspects of ENF analysis, a selection of which are summarized here.
No AES members have commented on this feature yet.
Subscribe to this discussion
Start a discussion!
If you are not yet an AES member and have something important to say about this feature then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.