Detection and Localization of Indo-Pacific Humpback Dolphin's Whistle Signal with multiple PAM stations in the vicinity of Taichung Harbor

摘要

For a nuclear-free homeland in 2025 and considering their international carbon reduction commitment, Taiwan's government is developing an independent green industry. The development of offshore wind farms along the western coast currently is the government's main energy policy. Nevertheless, the wind farm is adjacent to the China White Dolphin reservation zone. A passive acoustic monitoring system for cetaceans will be established as a development priority in the future wind farm operation. This study deployed four hydrophone stations near Taichung Harbor. To testify this system's capability, this study used a human-made dolphin whistle signal to imitate a real dolphin's call, and used a self-developed whistle detector to capture the signal. Moreover, we used the time difference of arrivals (TDOA) method to compute the localization of signal sources. This TDOA experiment was conducted near Taichung Harbor. The result showed that the average of the positioning errors was 150m due to the long range hydrophone array. Over all, this study provides initial reference directions for key technologies of the PAM used in Taiwan.