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In this 2 guest episode of The People Speak we hear first from audio expert analyst Ed Primeau who comments on the 911 calls made during the Trayvon Martin/George Zimmerman shooting incident.  Ed Primeau is an audio engineer who helps courts and law enforcement agencies understand the science and technology of voice identification. We all have distinctive characteristics to our voice and words, as well as how we pronounce those words. Each of us has a unique nasal cavity, larynx, teeth, tongue, and mouth.