I was walking to my car and I noticed a constant chirping/ringing from a field. It sounded like a mass of crickets and I couldn't localize or find a single cricket. The crickets (or noise making insects) must be producing an out of phase noise by rubbing their legs together. This way predators can't find them while they make their loud calls. But that leads to the idea that crickets can sense "out of phase" sound and and find the source. Because afterall, arn't they doing mating calls to attract others? So crickets can't experience home theater like we do because everything out of phase will be localized right in front of them. Too bad for them I guess.