Hello how may I help you? Can you tell me what the loudest sound ever was? Sure, let me search that for you Ok u do that The world's loudest sound: the Krakatoa volcanic eruption of 1883 Ok thanks. Legend has it that the blast was so loud that it ruptured eardrums of people 40 miles away. Wow that is loud . How far away was it heard? It's been said, it circled the globe four times and was clearly heard 3,000 miles away Very loud indeed Do you have any other questions today?