There are also a number of other services or procedures that can be classified in their own right as a specialty process or “miscellaneous” in terms of categorization. acim podcast Enhancement and Authentication.
Audio Enhancement
Audio enhancement is the most common and well known service where forensic audio is concerned.
It’s not likely that one can take a garbled and mangled inaudible conversation and “tweak it” to produce clear speech that is intelligible. While audio enhancement isn’t specifically focused on speech, that is usually the intent behind cleaning up or enhancing audio for legal purposes. It’s a means of reducing or filtering out unwanted noise from a poor recording in order to clear up the speech that’s covered with noise or is a victim of poor recording methods.
A forensic examiner is not a miracle worker however, and while modern software and equipment has provided a variety of tools to improve the quality of speech in a recording, there are still limitations. When it comes to enhancing speech, you can’t fix something that’s just not there. If the recording doesn’t contain the robust elements of someone’s speech, and the equipment only picked up bits of a word or phrase, there is no magic software to fill in the blanks. Enhancement techniques can sometimes have fantastic results with intelligibility, but more often would be a disappointment to the layperson.
In terms of speech enhancement, an examiner can offer critical listening in combination with forensic transc
There are also a number of other services or procedures that can be classified in their own right as a specialty process or “miscellaneous” in terms of categorization. This article will focus specifically on Audio Enhancement and Authentication.
Audio Enhancement
Audio enhancement is the most common and well known service where forensic audio is concerned.
It’s not likely that one can take a garbled and mangled inaudible conversation and “tweak it” to produce clear speech that is intelligible. While audio enhancement isn’t specifically focused on speech, that is usually the intent behind cleaning up or enhancing audio for legal purposes. It’s a means of reducing or filtering out unwanted noise from a poor recording in order to clear up the speech that’s covered with noise or is a victim of poor recording methods.
A forensic examiner is not a miracle worker however, and while modern software and equipment has provided a variety of tools to improve the quality of speech in a recording, there are still limitations. When it comes to enhancing speech, you can’t fix something that’s just not there. If the recording doesn’t contain the robust elements of someone’s speech, and the equipment only picked up bits of a word or phrase, there is no magic software to fill in the blanks. Enhancement techniques can sometimes have fantastic results with intelligibility, but more often would be a disappointment to the layperson.
In terms of speech enhancement, an examiner can offer critical listening in combination with forensic transcription and speech decoding methods to help identify and discern what is being said. Again, technology can only do so much so an examiner with linguistics and phonetics experience is usually best for the job. However, if the speech waveform isn’t picked up by the recording device or is masked by noises of the same frequency range, he won’t be able to decipher the speech.
Forensic audio enhancement sometimes simply involves increasing the volume of a whisper from a suspect where traditional playback – even at high volume – can’t help an individual understand the utterance. Audio enhancement offers the most benefit in situations where noise can be eliminated or at least reduced so as not to distract the listener from the speech. Enhancement techniques are quite good at getting rid of electronic buzzing or hum and other noises such as tape hiss, the crackles and pops of a phonograph record or the beeping of a backing truck, open car door, low battery warning of a fire detector, etc. Enhancement used in this way is often called improving the listenability of the recording. Unintelligible speech isn’t made intelligible but the recording is easier on the ears.
Article Source: http://EzineArticles.com/6102318
ription and speech decoding methods to help identify and discern what is being said. Again, technology can only do so much so an examiner with linguistics and phonetics experience is usually best for the job. However, if the speech waveform isn’t picked up by the recording device or is masked by noises of the same frequency range, he won’t be able to decipher the speech.
Forensic audio enhancement sometimes simply involves increasing the volume of a whisper from a suspect where traditional playback – even at high volume – can’t help an individual understand the utterance. Audio enhancement offers the most benefit in situations where noise can be eliminated or at least reduced so as not to distract the listener from the speech.
Enhancement techniques are quite good at getting rid of electronic buzzing or hum and other noises such as tape hiss, the crackles and pops of a phonograph record or the beeping of a backing truck, open car door, low battery warning of a fire detector, etc. Enhancement used in this way is often called improving the listenability of the recording. Unintelligible speech isn’t made intelligible but the recording is easier on the ears.