Engine noise from boats travelling through killer whales' habitats ranges in frequency from 100 hertz to 3, 000 hertz, an acoustical range that overlaps that in which the whales communicate through screams and squeals  Though killer whales do not seem to behave differently around running boat engines, engine noise from boats can be loud enough to damage their hearing over time
Ttherefore,
killer whales are most likely to prefer areas where boat traffic is present, but light