https://scholars.lib.ntu.edu.tw/handle/123456789/451169
標題: | Study and application of underwater noise impact in coastal region off western Taiwan | 作者: | Cheng, Y.-C. Lin, S.-F. Chang, Y.-Y. Chen, C.-F. Hung, C.-F. Lin, B.-J. CHI-FANG CHEN |
關鍵字: | Ambient noise; Noise impact alert region; Noise threshold; Transmission loss | 公開日期: | 2014 | 卷: | 22 | 期: | 1 | 來源出版物: | Journal of Computational Acoustics | 摘要: | Offshore wind farms are the main project on Taiwan's western coast. Since the underwater noise generated by piling poses a threat to marine mammals, the issue of the detrimental impact of noise on Sousa Chinensis has drawn considerable attention. To avoid behavioral disturbances and injury from pile driving noise, we propose the Underwater Noise Impact Region Alert System (UNIRAS) to estimate the acoustic field at any depth and distance from the piling sources. The system can be illustrated as four components: environment databases, an acoustic propagation model, source modeling and alert region (AR) prediction. Inputs are derived from the Taiwan Coastal Ocean Nowcast/Forecast System (TCONFS), which generates underwater sound speed profiles with temporal and spatial variation, along with geoacoustic and bathymetry databases that are imported as environmental inputs. Adiabatic mode theory is used to simulate the piling noise propagation in shallow water and the impulsive noise emanating from the source is evaluated via the finite element method. With the auditory threshold of cetacean being set as the criterion level, the system can demonstrate the modeling outputs and predict the noise impact region, and these results are useful for planning how to station the guard boats to prevent dolphins from entering the noise impact region. © IMACS. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/451169 | DOI: | 10.1142/S0218396X14400074 |
顯示於: | 工程科學及海洋工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。