Posted on 06/22/2013 7:39:32 AM PDT by spacejunkie2001
In a major victory for murder suspect George Zimmerman, a judge today ruled that prosecutors may not put on the witness stand two state audio experts who say the voice heard screaming in the background of a 911 call was someone other than Zimmerman.
The judge had heard three days of testimony about the science used by the state's experts and ruled that it failed to meet Florida's legal standard.
One of the experts, Alan R. Reich, had concluded the voice he identified as Trayvon is heard yelling "I'm begging you" and "stop." The other, Tom Owen, says he ruled Zimmerman out as the screamer with biometric software.
Both are now banned.
(Excerpt) Read more at orlandosentinel.com ...
They'll find something racist, "unfair" or biased from the defense team or the judge every day till the final verdict.
Leni
Land-line phones pass through basically everything from about 300Hz to 3300Hz, since decades of research and usage have shown such range to be adequate for people's voices to sound the way people expect them to sound on a telephone. Digital phone systems have, for the last couple decades, sampled audio at an 8KHz rate with 8-bits per sample and sent is as a 64kbps stream of bits.
Digital mobile phones need to use lower data rates, so rather than trying to send all frequency components simultaneously, they identify the most important parts of the signal and just sent the characteristics of those. All other information in the signal is abandoned. Audio which has been processed in good enough for mobile subscribers to tolerate, but it often doesn't sound a whole lot like the original, and is basically useless for forensic analysis.
Yes, spontaneous utterances are most revealing. . .and most times admissible.
I don't follow your logic.
Why is it different case? and why does it warrant a charge of 2nd degree murder?
Why was Trayvon Martin suspicious to George Z:
http://www.youtube.com/watch?feature=player_embedded&v=Mdxw8aByLGQ#at=20
Have a good night’s sleep, Bernie.
To add to what you said:
http://en.wikipedia.org/wiki/Mean_opinion_score - audible deficiencies in codec quality.
The eight bit sampling at 8 kHz with no compression example, is G.711, which already has artifacts showing up.
These are just for the basic encoding. Microphone quality, any digital to analog coversions, and recording medium all worsen this - without getting to microphone placement and background events; or decoding reconstructions due to bit loss, comfort noise,and echo cancellation.
It seemed to me the adjusted statement was very different from the original - enough so that it could be describing a different incident.
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