| Title |
Evaluation and Prediction of the Characteristics of Noise Reduction depending on the Shapes of the Tunnel Section |
| Authors |
Oh. Yang-Ki ; Kim. Ha-Geun ; Lee. Won-Yeul |
| Keywords |
Noise Barrier Tunnel ; Noise Reduction ; Difference of Noise Level ; Traffic Noise ; High Rise Apartment |
| Abstract |
It seems inevitable for residential buildings to be high-rise and allocated near traffic roads due to the crowdedness in urban area. Acoustic environments in those areas have been seriously deteriorated by the increase of traffic vehicles. But, Sound barriers have a limitation in controlling noise due to diffraction noise. Hence sound barrier is not effective to protect the high-rise apartment from traffic noise. This work aims at predicting the difference of noise level between in and out of tunnel and evaluating??characteristics of noise reduction according to the tunnel section shape by using 1/5 scale model. We carried out a number of field measurements for 1/5 scale model of noise barrier tunnel with various sectional shapes. The results are as follows 1) The difference of noise level between in and out of tunnel is about 10dB(A) whether there is opening in the ceiling or not. 2) The results from predictions and the measurements show generally good agreement within 0.3~3.6dB(A) |