It is not exaggeration, military sonars are no joke (hint they are powered by nuclear reactors) :

https://www.slashgear.com/1337068/terrifying-effect-submarine-radar-humans/

https://physics.stackexchange.com/questions/93222/could-submarine-sonar-kill-a-diver

https://www.scientificamerican.com/article/does-military-sonar-kill/

https://www.reddit.com/r/WarCollege/comments/17yy851/how_dangerous_is_active_sonar_for_divers/

https://ocean.si.edu/ocean-life/marine-mammals/listening-clues-about-sonars-effects-marine-mammals

https://www.rmhcene.org/environmental-implications-of-using-sonar-technology

https://en.m.wikipedia.org/wiki/Marine_mammals_and_sonar