TRANSPORTATION VEHICLE SOUND INSULATION PROCESS AND DEVICE
摘要
A sound insulation process comprises (a) providing at least one sound insulation device comprising at least one sound barrier comprising at least one substantially periodic array of structures disposed in a first medium having a first density, the structures being made of a second medium having a second density different from the first density, wherein one of the first and second media is a viscoelastic medium having a speed of propagation of longitudinal sound wave and a speed of propagation of transverse sound wave, the speed of propagation of longitudinal sound wave being at least about 30 times the speed of propagation of transverse sound wave, and wherein the other of the first and second media is a viscoelastic or elastic medium; and (b) interposing the sound insulation device between an acoustic source area and an acoustic receiving area of a transportation vehicle.
申请公布号
EP2376311(B1)
申请公布日期
2016.05.18
申请号
EP20090835616
申请日期
2009.12.16
申请人
3M INNOVATIVE PROPERTIES COMPANY
发明人
BERKER, ALI;GREGER, RICHARD W.;ALOSHYNA EP LESUFFLEUR, MARIE;MANDANAS, MICHAEL, PATRICK, M.;MOHANTY, SANAT;YLITALO, DAVID, A.;ZIMMERMAN, PATRICK, G.