지하철 터널 출구 형상에 따른 소음전파 특성에 관한 연구
A Study on the Noise Propagation Characteristics According to the Shape of a Subway Tunnel Exit
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초록
The sound wave generated by sound sources is reflected by interior walls and it leads to raise the sound energy density in the structure like subway tunnel. Then this sound wave with high sound energy density propagates both toward entrance and exit of tunnel and it radiates out of that tunnel. Therefore this study was performed to investigate both the sound pressure reflection coefficient and the acoustic directivity about radiated noise from tunnel exit using experiment and acoustic analysis according to the exit shape of tunnel. Through investigating sound pressure reflection coefficient and acoustic directivity, we tried to figure out the characteristics of propagated sound from tunnel exit. From the both experimental and analytical results, it was found that higher sound reflection coefficient was measured under the condition that inclined tunnel exit degree was getting bigger.
Abstract
The sound wave generated by sound sources is reflected by interior walls and it leads to raise the sound energy density in the structure like subway tunnel. Then this sound wave with high sound energy density propagates both toward entrance and exit of tunnel and it radiates out of that tunnel. Therefore this study was performed to investigate both the sound pressure reflection coefficient and the acoustic directivity about radiated noise from tunnel exit using experiment and acoustic analysis according to the exit shape of tunnel. Through investigating sound pressure reflection coefficient and acoustic directivity, we tried to figure out the characteristics of propagated sound from tunnel exit. From the both experimental and analytical results, it was found that higher sound reflection coefficient was measured under the condition that inclined tunnel exit degree was getting bigger.
참고문헌 (18)
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