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- W2393867772 abstract "Research purposes: It was found there were some limitations and deficiencies about the sound absorption(or insulation) properties,impact resistance and their test method stipulated in Technical Requirements and Test Method for Acoustic Elements of Railway's Sound Barrier(TB/T3122-2005) when using the Technical Requirements and Test Method for Acoustic Elements of Railway's Sound Barrier to determine the performance indexes of acoustic elements of sound barrier.In order to meet the needs of construction and the requirements of high speed of railway and low frequency noise of train,some modification proposals are offered in this paper.Research conclusions:This paper analyzes the limitations about the noise reduction coefficient and weighted sound reduction index stipulated in the current standard based on the spectrum characteristics and distribution range of railway sound source,offers the proposal that the noise reduction coefficient and weighted sound reduction index should be changed into sound absorption coefficient and transmission loss of different frequency based on related standards at home and abroad,discusses the deficiencies about the impact resistance and test method for acoustic elements of sound barrier material based on practicable railway's sound barrier material,and gives the suggestions that there should be the different performance requirements and test methods for the different materials." @default.
- W2393867772 created "2016-06-24" @default.
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- W2393867772 date "2009-01-01" @default.
- W2393867772 modified "2023-09-26" @default.
- W2393867772 title "Proposals for Technical Requirements and Test Method for Acoustic Elements of Railway′s Sound Barrier" @default.
- W2393867772 hasPublicationYear "2009" @default.
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