Audio Evidence
Audio evidence can include but is not limited to confidential informant recordings, confession recordings, telephone intercept, voice mail and 911 calls. The goal of the forensic examiner is to be sure a chain of custody has been maintained like any other evidence and that the …Read More
Audio Evidence and State Public Defenders
I have a great deal of respect for State Public Defenders. They are lawyers who practice law for people who cannot otherwise afford legal assistance. The State Public Defender coordinates accused citizen?s legal representation to indigent people who are accused of a crime. Some cases …Read More
The Noise Floor: A Forensic Aid for Audio Authentication and Voice Identification
Audio authentication and voice identification requires that a forensic expert examine three critical aspects of an audio recording before beginning any forensic process. Whether it be analogue or digital audio recording, an audio forensic expert should inspect the consistent characteristics of the sound wave formations; …Read More
Clarification of Audio Recordings for Authentication
All recordings–both?digital and analogue–have a noise floor. The term originated when manufacturers of analogue audio recorders referred to the extraneous noise that their machine created in addition to the desired recorded audio signal.
Often a background noise constitutes most of the audio recording and covers a …Read More
Equalization for Audio Clarification
Equalization settings can be adjusted to help the forensic expert recover lost or poorly recorded audio. ?This blog post covers basic audio clarification.
The sound spectrum is measured in frequencies. All audio sounds like a car horn, gunshot and spoken words have frequencies associated with them. …Read More
Voice Identification in a Digital World
Audio forensic experts have more voice identification cases today than ever before. Legal cases have more audio evidence than ever before and voice identification has become a critical component to many legal proceedings. Voice mail, confidential informant recordings, call verification centers, 911 and other digital …Read More
The Value of an Expert Witness
An expert witness is a person who by virtue of education, training, skill, or experience, is believed to have expertise and specialized knowledge in a particular subject. His or her expertise is beyond that of the average person, sufficient that others may officially and legally …Read More
Noise Reduction for Sound Clarification
The first step when restoring audio is to remove background noise. More often than not, a recording in need of sound clarification or restoration has background noise covering the sounds that are desired to be heard. Noise reduction is the process of reducing and often …Read More
Voice Identification: Yep It’s Him, Thomas Pynchon
Yep It’s Him, Thomas Pynchon
By Steven Kurutz
Last Tuesday, long-suffering fans of the reclusive writer Thomas Pynchon received a double gift. Pynchon?s latest book, ?Inherent Vice,? a stoned-out detective story set in early-?70s L.A., was released by Penguin Press (read the Journal?s review). And to promote …Read More