http://articles.orlandosentinel.com...cation-expert-reasonable-scientific-certainty Trayvon Martin shooting: It's not George Zimmerman crying for help on 911 recording, 2 experts say As the Trayvon Martin controversy splinters into a debate about self-defense, a central question remains: Who was heard crying for help on a 911 call in the moments before the teen was shot? A leading expert in the field of forensic voice identification sought to answer that question by analyzing the recordings for the Orlando Sentinel. His result: It was not George Zimmerman who called for help. Tom Owen, forensic consultant for Owen Forensic Services LLC and chair emeritus for the American Board of Recorded Evidence, used voice identification software to rule out Zimmerman. Another expert contacted by the Sentinel, utilizing different techniques, came to the same conclusion. Zimmerman claims self-defense in the shooting and told police he was the one screaming for help. But these experts say the evidence tells a different story. 'Scientific certainty' On a rainy night in late February, a woman called 911 to report someone crying out for help in her gated Sanford community, Retreat at Twin Lakes. Though several of her neighbors eventually called authorities, she phoned early enough for dispatchers to hear the panicked cries and the gunshot that took Trayvon Martin's life. George Zimmerman, a Neighborhood Watch volunteer, shot Trayvon, an unarmed 17-year-old, during a one-on-one confrontation Feb. 26. Before the shot, one of them can be heard screaming for help. Owen, a court-qualified expert witness and former chief engineer for the New York Public Library's Rodgers and Hammerstein Archives of Recorded Sound, is an authority on biometric voice analysis â a computerized process comparing attributes of voices to determine whether they match. After the Sentinel contacted Owen, he used software called Easy Voice Biometrics to compare Zimmerman's voice to the 911 call screams. "I took all of the screams and put those together, and cut out everything else," Owen says. The software compared that audio to Zimmerman's voice. It returned a 48 percent match. Owen said to reach a positive match with audio of this quality, he'd expect higher than 90 percent. "As a result of that, you can say with reasonable scientific certainty that it's not Zimmerman," Owen says, stressing that he cannot confirm the voice as Trayvon's, because he didn't have a sample of the teen's voice to compare. Forensic voice identification is not a new or novel concept; in fact, a recent U.S. Department of Justice committee report notes that federal interest in the technology "has a history of nearly 70 years." In the post 9-11 world, Owen says, voice identification is "the main biometric tool" used to track international criminals, as well as terrorists. "These people don't leave fingerprints, but they do still need to talk to one another," he says. 'The home run' Though the term "biometric analysis" may sound futuristic, it basically just means using personal characteristics for identification. A fingerprint scanner is an example of a biometric device. Much as the ridges of a human hand produce a fingerprint, each human voice has unique, distinguishable traits, Owen says. "They're all particular to the individual." Another benefit of modern biometric analysis, Owen said, is it doesn't require an "in context" comparison. In other words, Owen didn't need a sample of Zimmerman screaming in order to compare his voice to the call. The technology Owen used to analyze the Zimmerman tape has a wide range of applications, including national security and international policing, he said. A recently as January, Owen used the same technology to identify accused murderer Sheila Davalloo in a 911 call made almost a decade ago. Owen testified that it was Davalloo, accused of stabbing another woman nine times in a condo in Shippan, Conn., who reported the killing to police from a pay phone in November 2002. Davalloo was convicted, according to news reports. Owen says the audio from Zimmerman's call is much better quality than the 911 call in the Davalloo case. Voice identification experts judge the quality based on a signal-to-noise ratio; in other words, comparing the usable audio in a clip to the environmental noises that make a match difficult. And the call on which the screams are heard is better quality than is necessary, Owen says. "In our world, that's the home run," he says. Not all experts rely on biometrics. Ed Primeau, a Michigan-based audio engineer and forensics expert, is not a believer in the technology's use in courtroom settings. He relies instead on audio enhancement and human analysis based on forensic experience. After listening closely to the 911 tape on which the screams are heard, Primeau also has a strong opinion. "I believe that's Trayvon Martin in the background, without a doubt," Primeau says, stressing that the tone of the voice is a giveaway. "That's a young man screaming." Copyright © 2013, Orlando Sentinel
---------------------------------------------------------------------------------- You do not question how Trayvon is dead. You do not question why he is dead when he is 70 feet from where he is home. You do not question why he is dead when Trayvon have no guns, and no crime. Trayvon is only walking home in the rain of 7:00 pm in the community where he have the rights to be. You do not question that. You distract with your stupid post above. You distract and try to have the dog whistle for your friends to come to the thread. You distract.
Here is a map that shows the location of Trayvon Martin's body (use the hover over) and the townhouse he was staying at. The distance is considerable longer than 70 feet. Closer to 500 feet. Use the scale provided on the map to measure the distance. http://www.miamiherald.com/trayvon/ Why do you keep putting up information that is totally incorrect and does not align with facts in the case?
So you are posting information from fake audio expert 'Tom Owen' who has totally been discredited after the press found all his qualifications are fake. His position as chair emeritus for the American Board of Recorded Evidence is a society where he is the only member. The software sold by Owens is not a professional package and is not qualified for performing voice analysis.
Of course you never post the later articles where the Martin family denies that is Trayvon screaming in the 911 call.
I posted what I found from your link.I never read anything from Martins mother saying it wasn't Martin screaming which is why I kindly asked you to post it