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Remember how Mad Catz scored the exclusive rights to produce Xbox 360 wireless headphones? Here's the deal: these cans don't need to be tethered to your controller for voice chat or plugged into a wall to charge. According to  IGN , the new Mad Catz Warhead 7.1 will get everything it needs from a base station connected to your console. String USB and optical cables directly from the Xbox 360 to that tiny tower above, and you'll reportedly get enough 5.8GHz bandwidth to deliver virtual Dolby surround sound to four pairs of headphones at once -- plus wireless Xbox LIVE audio chat thanks to some native support from Microsoft. What's more, the USB base station will also give you an on-screen battery readout, and if the Warhead runs out of juice, you'll find a second swappable battery pack sitting in the base station's charger. If that sounds too rich for your blood, the Devastator will ditch the surround sound and rechargeable batteries while retaining the same con...

Ever wondered how well playing  Call of Duty  at maximum volume mimics a real combat experience? Researchers at the Missouri University of Science and Technology must have asked a similar question, because they've built a 64-speaker surround-sound audio battlefield designed to train new troops. The system reproduces screaming fighter jets, rumbling tanks, and persistent gunfire -- all the better to acclimate recruits to the overwhelming, disorienting cacophony of warfare. Veterans say even with the four large 20-hertz subwoofers, it's nowhere near the real thing: combat volume is 25 percent louder than the average rock concert, at levels that can cause permanent hearing loss. Still, the creators say every bit of training helps; having near-combat experience is certainly better than none at all. So tell that to your neighbors next time they bang on your wall. [Image via  The Associated Press ] Associated Press