工程机械驾驶室噪声控制研究

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2、-DissertationfortheMasterDegreeinEngineeringCABNOISECONTROLANDRESEARCHOFENGINEERINGMACHINARYCandidate:LiGuoweiSupervisor:Prof.WangYouqiangAcademicDegreeAppliedfor:MasterofEngineeringSpecialty:MechanicalEngineeringDateofOralExamination:Dec2015University:QingdaoTechnologicalUniversity硕±学位论文

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5、.....ⅠAbstract.....................................................................................................................................................Ⅲ第1章噪声降低概论.....................................................................................................................

6、.......11.1噪声降վ的研究背Ჟ................................................................................................................11.2噪声的概念৺ަ࠶类................................................................................................................11.2.1噪声৺ަ᧿述.....................

7、.................................................................................................11.2.2噪声的࠶类..........................................................................................................................21.2.3噪声的衡䟿...................