An acoustic composite comprises a flow resistive substrate having a solid acoustic barrier material bonded to at least a portion of a major surface of the flow resistive substrate; wherein the acoustic barrier material has a density greater than about 1 g/cm3 and the acoustic composite has a porosity between about 0.002 % and about 50 %.
申请公布号
WO2009137466(A3)
申请公布日期
2010.01.07
申请号
WO2009US42824
申请日期
2009.05.05
申请人
3M INNOVATIVE PROPERTIES COMPANY;ALEXANDER, JONATHAN, H.;SLAMA, DAVID, F.