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By what mechanism or combination of mechanisms does the X-59 reduce the noise produced by a sonic boom? What are the design choices that lead to quiet supersonic flight? I really want to understand the issue from an aerodynamic perspective as well as a design perspective.

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  • $\begingroup$ it would be helpful to have a picture in the question so we can see the details of what you are talking about. $\endgroup$ – Zac Callaghan Jun 20 at 21:59
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The X-59 has not yet flown, but according to the designers...

The ground noise is expected to be around 60 dB(A), about 1/1000 as loud as current supersonic aircraft. This is achieved by using a long, narrow airframe and canards to keep the shock waves from coalescing. It should create a 75 Perceived Level decibel (PLdB) thump on ground, as loud as closing a car door, compared with 105-110 PLdB for the Concorde. The central engine has a top-mounted intake for low boom, but inlet flow distortion due to vortices is a concern.

Source: Wikipedia

Additional information on this NASA project is available here.

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