Audio Forensics
Audio forensic is the field related to the acquisition, analysis, and evaluation of sound recording that also be represented as admissible evidence in the court of law.
Audio Forensics?
Audio forensic is the field related to the acquisition, analysis and evaluation of sound recording that also be represented as admissible evidences in the court of law. Audio forensic evidence may come from criminal investigation by law enforcement or as a part of an official enquiry of fraud or other civil incident, establishing the audio authenticity performing audio enhancement of audio recording to improve speech intelligibility and the audibility of low level sounds, interpreting and documenting sonic evidence such as identifying talkers, transcribing dialogs.
Modern audio forensic makes extensive use of digital signal processing with the former use of analog filters now being obsolete. Technique as adapt filtering and discrete Fourier transform are used extensively recent advances in audio forensic techniques include voice bio metrics and electrical network frequency analysis.
- Forensic analyst creates a forensic transcript, forensic transcription is the scientific observation of the words under control conditions, forensic transcription accompanies an audio enhancement, audio enhancement is the process of removing the unwanted sound and enhancing the wanted sound and most often its dialog but if sometimes it’s still difficult to hear that the audio then the forensic transcript document acts as an add-on that is the scientific document that is signed and sawn by the expert witness as to the words that are spoken. The audios are enhanced forensically by using principles that are accepted by the scientific community.
- The forensic transcript is created by an expert who is expert in understanding in deciphering dialog and unbiased, who has to zoom in and look at the formants of the words in the spectrogram which is the display of the sound and combined with critical listening and viewing the spectrogram and comparing the words that are in question in one part of recording with the recording on the other part.
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