March 28th, 2014
09:44 PM ET

What black box 'pings' really sound like

Once search crews zero in on Flight 370's location, the hope is sonar 'pings' will lead them to the plane's black boxes. But there are several factors that seriously complicate that effort. Safety analyst David Soucie demonstrates how a sonar 'pinger' works and what it sounds like.

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Filed under: Malaysia Airlines Flight 370
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