| Title |
Evaluation on the Characteristics of Noise Reduction according to the Tunnel Section Shape |
| Authors |
Lee Won-Yeul ; Kim Ha-Geun ; Oh Yang-Ki ; Ju Mun-Ki |
| Keywords |
방음터널 ; 교통소음 ; 고층아파트방음터널 ; 교통소음 ; 고층아파트 |
| Abstract |
It seems inevitable for residential buildings to be high-rise and allocated near traffic roads due to the crowdedness in urban areas. 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 from sound barriers. Hence sound barrier is not effective to protect the high-rise apartment from traffic noise. This work aims at evaluating characteristics of noise reduction according to the tunnel section shapes by using 1/5 scale model. We carried out a number of field measurements for 1/5 scale model of noise barrier tunnels with various sectional shapes. The results were as follows 1) The level difference was ranged from 0dB to 1.2dB according to the opening in the ceiling 2) The level difference was ranged from 0.4dB to 2.3dB when sound-absorbing materials were increased up to 45% of all surface areas. 3) There was generally good agreement between prediction results and the measurement results. |