Hello how may I help you? Hi! How may I help? can you look up a world record for me? Sure. What would you like to know? what was the loudest recorded sound? The loudest sound recorded was the explosion of the Krakatoa Volcano. how many decibels was it? It was 170db at around 100 miles away. when did this happen? It happened at around 1885. ok cool, thanks! Great!