The article is pretty light on specifics, but interesting.http://www.popsci.com/why-lockheed-martin-is-blasting-orion-crew-capsule-with-noise-from-1500-speakers
From my days in military avionics, I remember strapping things to 20" voice coils and various other things to test them. There was even a place in SoCal that would load a plucked chicken into a howitzer and fire it at a test unit.
I think jet engine manufacturers still do something similar to simulate bird strikes - not sure it's an actual howitzer for them though.
Turns out it's actually quite difficult to make 30hz at 145+Db. 😀
It depends at what distance the measurement is made at.But it is actually not all that hard.
But are those organic, free-range chickens?
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