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- W4382519172 abstract "Poor acoustic environment is known in long traffic tunnels due to heavy traffic and low sound absorption performance in such long enclosures. In this paper, a numerical study on sound field in a long traffic tunnel is conducted. The basis geometry model was first built and parameter settings in numerical modeling were carried out for numerical simulations. Speech intelligibility (rapid speech transmission index, RASTI) and reverberation time (RT) in the long traffic tunnel were then evaluated. Numerical results demonstrate the low speech intelligibility (RASTI = 0.3) in such tunnel, where better speech intelligibility (merely 0.45) is found only in the areas around the source. Long reverberation time larger than 4 s in the frequencies below 1000 Hz is also found at some receivers, and significant attenuation of sound wave in higher frequencies is observed in the tunnel. Furthermore, source position influences speech intelligibility and reverberation time; higher RASTI and lower RT are found when the source is located at the entrance of the tunnel than in the middle." @default.
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- W4382519172 date "2023-01-01" @default.
- W4382519172 modified "2023-09-27" @default.
- W4382519172 title "Numerical Study on Acoustic Environment in Long Traffic Tunnels" @default.
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- W4382519172 doi "https://doi.org/10.1007/978-3-031-30233-6_17" @default.
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