Magna vibrates Rear Glass Window to Act as Subwoofer

By Automotive Staff | February 22, 2011
Well, this is different. Automotive supplier Magna International recently unveiled its new technology that replaces conventional subwoofers with the rear glass of a vehicle. Put simply, a subwoofer is no more than a concave-shaped material that moves in and out when directed by an electrical current. Magna utilizes similar properties of the rear glass found in vehicles to act as a diaphragm much like in a conventional subwoofer. Causing the glass to vibrate, two exciters are installed at its base, and an amplifier boosts the source’s signal. A unique sealant helps the glass move in and out trouble free. Its foundation in noise-cancelling technology means that the system doesn’t project the sound of the bass outside the vehicle, like many aftermarket systems. Whether or not it is used as to replace a subwoofer, the new technology can still be used for its noise-cancelling abilities. “It is a whole new way to generate sound in a car,” Magna product director Gregg Rizzo told The Detroit News. ”It’s like sitting inside a subwoofer box.”
Magna has spent four years researching and developing noise-cancelling technology for automotive applications. The program utilizes a vehicle’s glass and sealants to muffle exterior and engine noises providing a more pleasant driving experience. The company expects automakers to adopt the technology and hopes to see it on production vehicles by 2015. via The Detroit News courtesy of Motor Trend Staff
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Way cool. If insurers suddenly see a spike in claims for rear glass windows breaking, we will know that someone is using bigger amplifiers for their "subwoofers" haha.