[Eduard]

that's -60dB, no?

like the reduction from gunshot (140dB) to alarm clock (80dB)... or jet plane take-off (120dB) to normal conversation (60dB).

Depending on the actual, absolute values, one-millionth can therefore be still annoying — especially if it is pervasive and omnipresent.

[cogman10]

The innovation here is to make that unidirectional rather than omnidirectional. So seems reasonable to conclude that even if the beam is gunshot noisy, outside the beam is basically silent.