Military sonars are so loud that if you happened to be idly floating near one (let's say closer than 500 meters away) as it does one of its strongest pings, your entire body would cavitate into pink mist; it's weakest ping would rupture every organ in your body instantly, all of your bones would fracture in place and some of your blood at the skin surface would boil from the sonars ping causing rapid pressure changes right in front of whatever is supposed to remain of your face.

Imagine standing next to a hundred grenades as they all simultaneously explode, but also pretend you are spared from the heat wave of the explosion and not the blast wave.