00847nam0-22002891i-450-99000049166040332120071025104920.0000049166FED01000049166(Aleph)000049166FED0100004916620020821d1960----km-y0itay50------baenga-------001yyNoise reductionprepared for a special summer program at the Massachusetts Institute of technologyEdited by Leo L. BeranekNew YorkMcGraw-Hill1960752 p.ill.23 cmIngegneria industrialeRumoreAttenuazione620.23Beranek,Leo LeroyITUNINARICAUNIMARCBK99000049166040332110 D III 393766DINELDINELUNINA