Research leads to whisper quiet UAVs.

• Author: Williams, Robert H.
• Position: TECH TALK: A TIP-SHEET ON THE LATEST GADGETS

While many low altitude unmanned aerial vehicles are able to frustrate visual, radar and infrared detection, the noise they emit especially as they hone in on targets can give them away.

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Engineers and technicians at Georgia Tech Research Institute ate seeking ways to reduce the acoustic signature of these UAVs without disrupting on board sensors. Rick Gaeta, an aeroacoustics specialist, says work so far has allowed "us to separate acoustics issues into...