This entails analysing digital audio files to determine if any of the audio recording has been edited out, the background noise is consistent, and if audible and inaudible tones/sine wave traces remain consistent throughout. Inconsistencies would indicate the audio has been tampered with.
In the case of analogue audio, our analysts listen critically to the audio file in its entirety. We specifically listen for unfinished words, abnormal intonation and sentences that lack continuity and conversational flow, audio dropouts across the recording and examples of badly edited sections.
FVS are also able to identify reasons for audio dropout, including:
- The copying method from the original exhibit
- Badly set up equipment
- Badly functioning equipment
- Audio Authentication.
- Audio transcripts of conversations.
An expert ear is often essential to clearly understand what is going on. FVS can critically listen to a recording and produce a court-ready transcript of any English-language conversation.
We are also able to comment on the audibility and intelligibility of a recording:
If a voice cannot be heard then it is inaudible.
If a voice can be heard, but not understood, then it is unintelligible.
All FVS audio reports and transcriptions are independently peer-reviewed, and have been used to assist courts on a number of occasions.