There are many components, departments, etc involved in crime investigation. Forensic audio analysis allows investigators to examine and understand types of sounds -- such as recordings -- from a particular crime scene. Audio forensics is an important part of any investigation.
Analysis of forensic sound is not as easy as listening to the radio. Sound has many layers and each must be isolated to be analyzed thoroughly. The audio's authenticity is challenged to be certain that it is worthy to be passed as evidence in a court of law. If it is confirmed authentic, the crucial portions in the sound such as ambient sounds and dialogue are enhanced for improved audibility. People talking in the clip must be identified because they are part of the crime scene. Dialogues are transcribed and the persons involved will be identified and tracked down by investigators.
In authenticating a recording, it is important to first determine whether a recording has been tampered with in any way. It requires a very specific skillset and equipment, and is not an easy task to carry out. New technology allows for authenticating to be done in alternative ways, though it is currently under scrutiny.
The process of enhancing a recording involves "cleaning" it -- clearing away static and other unwanted noises. The point of enhancing is to carefully uncover the evidence in the recording without accidentally destroying it. It is also possible to "reverse engineer" a noise in a recording in order to help determine where exactly it came from.
Sound analysis first came onto the scene during the Watergate scandal, when investigators had to pick apart the audio recordings ceased in the course of the investigation. In those days they had racks of huge equipment to help them. Today, however, most of the work is done digitally, on computers. Today's technology can achieve what would have been impossible back during the Watergate investigation. However, a working knowledge of the old equipment is still welcome and appreciated even in today's digital world.
On an average day, a forensics audio lab will handle a lot of sensitive sound recordings. For example, they analyze emergency calls to 911, voice mails from cell phones, memory cards recovered from mobile devices, and computer recordings which are all connected to crimes of some sort. It is the job of the lab to analyze these recordings and sounds and maker sure they are reliable in a court of law.
These forensic technicians are also often called upon to testify in court. When they are on the stand they have to defend their findings. It is therefore important to make sure their findings stand up under scrutiny.
A crime scene is composed of many factors, one of which and often overlooked is the sound. Recordings provide proofs in terms of alibis, motives and persons associated and present in the crime. Audio forensics covers this aspect and is crucial in an investigation, giving life to the recreation of a crime scene.
Analysis of forensic sound is not as easy as listening to the radio. Sound has many layers and each must be isolated to be analyzed thoroughly. The audio's authenticity is challenged to be certain that it is worthy to be passed as evidence in a court of law. If it is confirmed authentic, the crucial portions in the sound such as ambient sounds and dialogue are enhanced for improved audibility. People talking in the clip must be identified because they are part of the crime scene. Dialogues are transcribed and the persons involved will be identified and tracked down by investigators.
In authenticating a recording, it is important to first determine whether a recording has been tampered with in any way. It requires a very specific skillset and equipment, and is not an easy task to carry out. New technology allows for authenticating to be done in alternative ways, though it is currently under scrutiny.
The process of enhancing a recording involves "cleaning" it -- clearing away static and other unwanted noises. The point of enhancing is to carefully uncover the evidence in the recording without accidentally destroying it. It is also possible to "reverse engineer" a noise in a recording in order to help determine where exactly it came from.
Sound analysis first came onto the scene during the Watergate scandal, when investigators had to pick apart the audio recordings ceased in the course of the investigation. In those days they had racks of huge equipment to help them. Today, however, most of the work is done digitally, on computers. Today's technology can achieve what would have been impossible back during the Watergate investigation. However, a working knowledge of the old equipment is still welcome and appreciated even in today's digital world.
On an average day, a forensics audio lab will handle a lot of sensitive sound recordings. For example, they analyze emergency calls to 911, voice mails from cell phones, memory cards recovered from mobile devices, and computer recordings which are all connected to crimes of some sort. It is the job of the lab to analyze these recordings and sounds and maker sure they are reliable in a court of law.
These forensic technicians are also often called upon to testify in court. When they are on the stand they have to defend their findings. It is therefore important to make sure their findings stand up under scrutiny.
A crime scene is composed of many factors, one of which and often overlooked is the sound. Recordings provide proofs in terms of alibis, motives and persons associated and present in the crime. Audio forensics covers this aspect and is crucial in an investigation, giving life to the recreation of a crime scene.
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