공항철도의 실내소음 특성 분석
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Airport express line between InCheon international airport and KimPo has been started in April 2007. It has two kinds of train that are divided into commuter train and express. In this paper, we analysis the experimental results to characterize the interior noise for each train, as inside structure and materials of these trains are designed differently. It shows that the interior noise level of commuter train is higher about 10dB(A) than express in open territory, and it in tunnel and viaduct increase by 7~12dB(A) compared with open territory. Also, we know that the door in the gangway is effective in protecting the rolling noise transmitted from the outside between carbodys