Hello how may I help you? I want to know what the loudest recorded sound ever was The krakatoa volcanic eruption is the loudest ever recorded sound How loud in decibels was it? The sound was 300 decibels How does that compare to say a vacuum cleaner sound? A vacuum cleaner on average is about 2 decibels Wow that's quite a difference. How many decibels does it take to go deaf? Anything over 150 decibels would surely rupture your eardrums Wow. That's so cool and amazing to learn. Thanks No problem!