방음 루버의 음향효과 예측에 관한 연구

초록

In order to reduce damage of noise in residential area around railroad, it is established such as soundproof walls or soundproof tunnel. In a case of soundproof facilities established on bridge, it is needed to a lot of cost due to safety factor, also it is demanded weight-lightening design of soundproof facilities to be able to reduce reinforcement cost. This study is configured on a method of reducing soundproof facilities weight-lightening and wind load caused by external flow. Absorptive acoustic louver which is a type of silencer is concerned to reduce the weight of soundproof facilities and is measured using small reverberation chamber so that application of acoustic louver is confirmed to soundproof facilities. Insertion loss(IL) of acoustic louver is on the rise in particular frequency, whereas it is nearly constant except for that frequency. Therefore, acoustic louver is appropriated for soundproof tunnel. In further study, effect on environment noise with soundproof facilities applied by acoustic louver will be examined through numerical analysis in reality model.