RESEARCH ON A DEVICE FOR REDUCING NOISE

The purpose of this research study is to describe a new device for reducing noise based on the principles of sound refraction and interference, which can effectively reduce noise from highway and railroad traffic. This device has a back sound barrier panel that effectively reduces sound when the system is used on an existing sound barrier. In a test at the proving ground of the Bridgestone Corporation, the device with a back barrier of glass fiber reduced the nose emanating from an 11-ton truck by 5 to 6 dB(A).