High-Speed Vessel Noises in West Hong Kong Waters and Their Contributions Relative to Indo-Pacific Humpback Dolphins (Sousa chinensis)
Figure 5
(a) The various sound pressure level contributions of a Hi-Speed Ferry (R101), at Northeast Lantau Station number 1 with a Beaufort sea state of 2. The ambient noise level (represented in purple) was taken from Northwest Lantau number 1, an area with very little boat traffic, located within the Sha Chau and Lung Kwu Chau Marine Park. The red indicates the South Lantau Vessel Fairway (SLVF), a busy traffic area, especially for ferries. SLVF was recorded with several ferries and a shrimp trawler present during a Beaufort sea state of 0. (b) shows selected sound spectra of the above high-speed ferry in comparison to the spectra of humpback dolphin communication sounds at a distance of ≤100 m.
