Passive sonar just listens, active sonar sends a ping and listens for a return. To get good range that ping is very loud, loud enough to blow out ears drums and then the squishy solids in your head into squishy liquids rapidly escaping your head. We could get into the lung exploding aspects but I’ll just say, known sonar pings exceed 235db and ≈200 underwater can kill by lung overpressure.
Passive sonar just listens, active sonar sends a ping and listens for a return. To get good range that ping is very loud, loud enough to blow out ears drums and then the squishy solids in your head into squishy liquids rapidly escaping your head. We could get into the lung exploding aspects but I’ll just say, known sonar pings exceed 235db and ≈200 underwater can kill by lung overpressure.