[NGTM-1R]

Originally posted by EtherShock

Really? I think anyone that suffers permanent hearing damage would think it's a very big deal. That's still causing harm. It may not be using a gun that shoots bullets or some other projectile, but it's still shooting something that can harm. Yeah, like the government cares though.

http://en.wikipedia.org/wiki/Sarcasm

[Nico]

Originally posted by IceFire

That'd be extremely difficult.  You'd have to be operating at the same frequency with the same amplitude and then there is no guarantee that the waves would completely cancel each other out.  Although it would reduce it.

Its not impossible...its just highly improbable.

and from the exact opposite direction, hoping atmospheric pressure is not varying at all, there's no damp area, there's no heat difference, etc
Mmh, nope, that's sci-fi, it IS impossible.
On the other end, using a factory headgear will be much more efficient and will cost much less.