https://en.wikipedia.org/wiki/Oklahoma_City_sonic_boom_tests
>However, in the first 14 weeks, 147 windows in the city's two tallest buildings, the First National Bank and Liberty National Bank, were broken.
If a sonic boom is "noticeable", that's one thing. But the problem is that even from cruising altitude they're shockingly loud. If the sonic boom is merely bearable, that's quite an improvement.
Raises more questions though, because there were two other chase planes. Did the other planes stay below the sound barrier at all times?
Edit to add: Was no audible boom expected because of the planes themselves or because of where the people were watching from?
The distance between the planes appeared to be around 30-50 m at the supersonic transition time, as much as I can estimate the size of the planes. A sound recording made under the flight path should allow to measure how many dB was the demonstrator's boom.
> Was the sonic boom noticeable?
> Noticeable is certainly a way of putting it.
As in, "Yes it was noticeable, and then some." At least, that's how I read it.
Now, Boom might say (have they? I'm not following them) that the XB-1 is a demonstrator that they can do supersonic flight, and that the sonic boom reduction work will follow on. In that case asking what today's boom was is not that interesting.
The chase planes also went supersonic, so they would have contributed to the sonic boom, which might complicate that analysis (well, there would be at most 3 pairs of sonic booms, and it should be possible to tell which ones correspond to which planes).