| Summary: | 碩士 === 國立中興大學 === 環境工程學系所 === 99 === Taiwan High Speed Rail operated since 2005 and the noise along the rail has become another environmental impact on the residents. Although Taiwan EPA has begun to regulate noises of land transportation system in 2010, the regulation standards for traffic low-frequency noise has not yet defined and relevant researches are still lacking.
This study monitored and analyzed the low-frequency noise caused by high-speed railway train while exiting tunnels, and evaluated the noise impacts on the residents along the rail. The results showed that the low-frequency noise increased significantly when high-speed rail train passing through the tunnel exit. The maximal sound level (Lmax) adjacent to the tunnel are between 59.1 ~ 70.8 dB (A), and the hourly equivalent sound leves (Lheq) are between 36.1 ~ 52.1 dB (A). The indoor Lmax of adjacent residents are between 31.5 ~ 58.1 dB (A), and Lheq are between 10.6 ~ 38.0 dB (A). Although most of the Lheq monitored outdoors are lower than the regulation standard, most of the indoor Lmax are close to or higher than the regulation. Therefore, it’s necessary to employ adequate noise control and reduction strategies to reduce the impacts on the nearby residents.
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