Audio forensics

Control Risks Forensics’ dedicated audio specialists work in technically advanced audio laboratories to dramatically improve the quality of audio recordings, enhance, extract and identify distorted sounds and analyse recordings and voices.

Our experts deal with all types of sound recordings including:
  • Surveillance recordings
  • 999 calls
  • Police Interview Recordings
  • Dictaphones, mobile phones, mp3 etc
  • Voicemail / Answer phone messages
  • Audio from Camcorder Footage, CCTV and custody suites
  • Call centre recorded phone calls
 
Control Risks Forensics offers a free initial assessment, giving consultation and advice on forensic audio to clients in order to assess the potential evidential value of recordings or to advise on obtaining the best recordings.  
The largest audio enhancement cases have been processed through our laboratories (over 11,000 hours in our largest case).
Audio forensics requires meticulous attention to detail and tight control over the evidential chain; this is achieved within our secure double access controlled laboratory area.
 
Audio Laboratory forensics services:
  • Digital audio enhancement: Background noise reduction, hiss, hum, click and crackle removal and suppression of distortion artefacts and interference giving dramatically improved results
  • Editing for witness protection etc / audio copying / format conversion  
  • Recovery of audio recordings from damaged recording devices and tapes
  • Analysis of tapes and digital recordings for authenticity : Audio Authentication
  • Establishing the source and recording history of an audio recording
  • Voice Comparison and analysis of disputed utterances by expert phoneticians
  • Expert opinion on content through acoustic / auditory analysis
  • Audio event reconstruction at scene to establish sequence of events or noise characteristics
  • Enhancement of audio (video soundtracks) onto synchronised copy video
  • Application of subtitles
  • Speech Transcription.
  • Production of edited / enhanced copies on CD / DVD / tape
The ability to transcribe speech accurately from an audio recording can be crucial in investigative and legal cases. Proper interpretation of a few words can make the difference between winning and losing your case.
Control Risks offers a fast, accurate and professional audio transcription service from the most difficult to the largest volume recordings. We have the technical expertise and experience to produce and verify transcripts for courts or tribunals.
 
Transcription services include:
  • Analysis of disputed utterances by phoneticians
  • Production and verification of transcripts
  • Audio typing and production of court / police witness statements
Other forensic services from Control Risks
 
Whether it has been lost, deleted, hidden or disguised, if a crucial piece of evidence is in a computer, on a blurred video or recorded to an audio tape, we’ll discover it.