Noise emanating from passing ships may disturb animals such as killer whales and dolphins far more than previously thought, with new research showing that the animals’ communication and ability to find prey could be hampered by the underwater din.
These noise disturbances occurring at medium and higher frequencie -- including at 20,000Hz where killer whales, also known as orcas, hear bes -- could be hindering the ability of killer whales to communicate and echolocate – the process of using sound to bounce off objects such as prey and identify where they are. Dolphins and porpoises, which also operate at higher frequencies, may be suffering the same problems.
Source
Research paper (full): https://peerj.com/articles/1657/
These noise disturbances occurring at medium and higher frequencie -- including at 20,000Hz where killer whales, also known as orcas, hear bes -- could be hindering the ability of killer whales to communicate and echolocate – the process of using sound to bounce off objects such as prey and identify where they are. Dolphins and porpoises, which also operate at higher frequencies, may be suffering the same problems.
Source
Research paper (full): https://peerj.com/articles/1657/