Gulfstream Aerospace is actively researching sonic boom mitigation techniques and studying the noise impact of sonic over-flights to people on the ground, having verified the ability of its patented Quiet Spike extendable nose probe to turn a “boom” into a muted “rumble.” Tests at NASA Dryden Flight Research Center included flights of an F-15B modified with the Quiet Spike, as well as supersonic over-flights by NASA F-18s of test subjects in a specially instrumented house in the Edwards ...

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