Hola
No sé si será verdad, pero los de la noaa son algo serio, y dicen que con un tubo y pegando golpecitos (al tubo claro) parce que ese sonido les molesta.
Banging pipes, called oikomi pipes, are metal pipes about eight feet long which are lowered into the water and struck with a hammer to make a loud noise. These pipes have been used to drive or herd marine mammals. For killer whales, pipes were successfully used to help move several whales that were trapped in a freshwater lake in Alaska.
https://response.restoration.noaa.go...oil-spill.html