FAA proposal: Supersonic airliners can fly over US cities if they’re quiet

Yeah, if.

Hmm, what was the term for the audible affect of something traveling over the speed of sound? Sonic whisper? Sonic barely can can hear it?

It is possible though, a private company ironically named Boom had an experimental test flight last year that was supersonic with no audible boom at ground level. Only mach 1.1, but still.

as a treat

See the X-59 for a working example of quieter supersonic flight.

https://en.wikipedia.org/wiki/Lockheed_Martin_X-59_Quesst

As of 2017, the ground noise was expected to be around 60 dB(A), about 1/1000 as loud as current supersonic aircraft. This was to be achieved by using a long, narrow airframe and canards to keep the shock waves from coalescing.[4] A 2018 projection revised this figure, estimating that the aircraft would create a 75 EPNdB thump on ground, as loud as closing a car door, which would be around 16 times quieter than the 105-110 EPNdB boom made by Concorde (as decibels is a logarithmic scale).[5][33] The central engine has a top-mounted intake for low boom, but inlet flow distortion due to vortices is a concern.[11]