London Cops Use Electronic Frequencies To Fight Crime

London Cops Use Electronic Frequencies To Fight Crime
technology

Frequency analysis is helping forensic scientists separate genuine audio recordings from those that have been tampered with.

Emma Hutchings
  • 19 december 2012

Mains electricity emits a constant hum, known as the ‘mains frequency’, which becomes embedded in digital recordings made anywhere near an electrical power source. This noise is being used to help police in the UK fight crime, as forensic scientists can authenticate audio evidence to find out whether it is genuine or has been edited.

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