Taiwan is making efforts to transform its energy system in response to the global trend of climate change, vigorously developing renewable energy to achieve the goal of “Net Zero” emissions by 2050. However, the development of offshore wind farms may have an impact on the ecological environment of the vast western waters. The coastal waters are heavily used for human activities, and the adjacent protected reefs and estuary areas have abundant biodiversity, which may be greatly affected and require priority investigation. In recent years, passive underwater acoustic monitoring has been widely used. In addition to sound levels, it is also used for biodiversity surveys and ocean environmental impact assessments. This paper provides a review of passive acoustic monitoring studies conducted along the western coast of Taiwan in the past decade. The study period encompasses the pre-construction, construction, and operational phases of the first offshore wind turbine demonstration project, as well as the current underwater noise characteristics during the construction phase of offshore wind farms. During the large-scale development of offshore wind farms, passive acoustic monitoring is a great way to maintain a good and sustainable marine environment.
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