ENGINEERINGNET.EU -- Researchers at the Fraunhofer Institute for Industrial Engineering IAO and the Fraunhofer Institute for Building Physics IBP have developed a novel three-dimensional presentation of noise levels in cities as part of their “Virtual Cityscape” project.
One of the surprising results of this 3D mapping technique is that electric cars will hardly reduce these levels.
“Admittedly, you can barely hear electric cars when starting up. At about 30 kilometers per hour, however, you start to hear rolling noises that can get really loud at speeds of 50 kilometers per hour,” says Roland Blach, department head at IAO.
“Initial simulations found that the conventional simulation models stipulated by public agencies tend to average too sharply: we have yet to see any significant difference in the noise level in electric vehicles or gas-driven cars, since apparently it‘s the rolling noise that predominates.”
(picture: Fraunhofer IAO)
