Hello how may I help you? I want to know the loudest recorded sound ever. The loudest recorded sound was made by the Krakatoa volcano. How many decibels was the sound? The sound was 170 decibles. Did people go deaf? Fortunately, no one was affected by the sound. But 170 decibels is super loud. People go deaf with loud sounds. That's correct, but the volcano was far enough to not have a drastic effect on anyone. Thank you very much. No problem!