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| CATEGORIES ABOUT SOUND BAFFLE | |
| acoustics | |
| ceilings | |
| noise pollution | |
| noise reduction | |
| sound baffle | |
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DESIGN OF NOISE BARRIER S The technology for accurate prediction of Noise Barrier design using a Computer Model to analyze Roadway Noise has been available since the early 1970s. The earliest published scientific design of a Noise Barrier may have occurred in Santa Clara County , California in 1970, for a section of the Foothill Expressway in Los Altos , California. The county used a state of the art computer model for predicting the effects of sound propagation from roadways, with variables consisting of vehicle speed, Truck mix, Roadway surface type, Roadway Geometric s, micro Meteorology and the design of proposed soundwalls. EARLY HISTORY OF INTERIOR SOUND BAFFLE DESIGN Since the early 1900s scientists have been aware of the utility of certain types of interior coatings or baffles to improve the acoustics of concert halls, theaters, conference rooms and other spaces where the qualtiy of sound is important. By the mid 1950s Bolt, Beranek And Newman and a few other U.S. research organizations were developing technology to address these design challenges. This design field draws on several disciplines including acoustical science, Computer Model ing, Architecture and Materials Science . Sound baffles are also used in speaker cabinets to absorb energy from the pressure created by the speakers. In 1973 , Mrs. Elwood (Pearl P.) Randolph, a School Bus driver in Virginia , won a new school bus in nationwide contest held by Wayne Corporation soliciting new safety ideas for her suggestion that sound baffles be installed in the ceiling panels of school buses. In 1981 , they were first made mandatory by the state of California . Lifeguard School Bus won in national contest for safety ideas is presented to the winning Mrs. Elwood (Pearl P.) Randolph, a driver from Goochland County Public Schools at Virginia State Capitol ]] SEE ALSO |
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