Hello how may I help you? What was the loudest recorded sound? I can help with that. The largest recorded sound was the Krakatoa explosion in 1856. How loud was it? It was 176 decibels, making it the loudest recorded sound known to man. Did it harm anyone? Yes, the volcanic eruption and ensuing explosion caused over 36,000 to perish. That's crazy. It is. While the sound itself did not hurt anyone, it could be heard from almost half the distance of the world away. Hope this helps Ok, thanks Need any information about anything else?