期刊名称：Constantin Brancusi University's Annals, Letters and Social Sciences Serie
印刷版ISSN：1844-6051
出版年度：2011
期号：2
出版社：Academica Brancusi Publisher
摘要：The environmental protection represents presently one of the most serious problems, whit what is faced the humanity. The principle of sound absorption is elaborated, this followed by various types of sound absorption material, which include porous absorber, Helmholtz resonator, membrane absorber and perforated panel absorber.
