>>8568287a real sonar has always sounded like whales singing or dolphins chatting ever since WW2.
a "ping" was a kind of thing until they all learned (during the WW2) a ping doesn't really cut it when submerged.
You need a multi frequency feed, and you need to make it LOUD.
>a fuckton of harbor divers have gone stone deaf that instant thanks to a dumbass sonar officer conducting a live drill in a said harbor>true story