Forensic audio is the application of audio technology to the areas of criminal and civil law, security, and other matters of public interest. The field has developed rapidly in the past twenty years, and digital technology has made possible techniques that were almost unimaginable in the middle of the 20th century. Systems based on these techniques are now in routine use worldwide, and are no longer the preserve of government agencies (law enforcement, counter-terroism, drug enforcement, border and customs forces) and military intelligence. Smaller legal organisations and forces use forensic audio systems on a daily basis, while other industries that benefit from such techniques include avionics, air and marine accident investigation, and air traffic control.

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