Acoustic engineers at UPC realized that plastic scraps being thrown into landfills by luxury automakers had acoustic properties that could be utilized in sound barrier systems for walls and floors. The dB-3 and dB-4looring install under the drywall and floor. Both can reduce noise transmission by 75 percent and weigh far less than drywall-based sound solutions. For more info, go to HousingZone.com/PBinfo and enter # 314
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