Acoustic levels behind the aircraft were as previously predicted.
Ground testing was

audible at distances exceeding five miles from the airport runway

The moment that PDE engines start showing up in populated areas they
will be summarily banned just like the Concorde...
I have stood less than a hundred feet off the starboard wing of the
Concorde as it started its takeoff run and thoroughly enjoyed the
noise and the chest pounding - though I am sure the subdivisions near
the airport were scandalized......
I have stood five hundred feet (or more) from a modestly sized pulse
jet engine that was being tested (roughly 100 pounds of thrust) on a
rotating arm and absolutely could not stand it, I had to leave at a
dead run...

denny