From the March 2003 Issue of Sport Compact Car: The SEMA best of show article:

AEM V2 Cold-Air Intake

This is the kind of thing that John Concialdi thinks about on the throne. A Helmholtz resonator is a proven, time-honored way of bouncing intake pulses back down the intake for a mild supercharging effect. AEM managed to create such a resonator with this cocentric tube design and a few hundred dyno pulls. The result is absolutely ridiculous power gains for an intake, like 16.9hp and 14 ft-lb of torque on a 96-00 Civic DX.

So I'm not sure whether this represents a legitimate endorsement of what AEM says about the V2 or not. I'm inclined to believe that SCC wouldn't print it if it weren't so but we'll see. As for the physical application of the Helmholtz resonator, I found an explanation (albeit technical) on this website.

http://www.phys.unsw.edu.au/~jw/Helmholtz.html

Oh, and to whoever said physics doesn't matter. :fawk: