Hello how may I help you? i want to know something I can help you know more about world records. what do you need help finding? what is the loudest recorded sound? The loudest recorded sound was from the volcanic eruption of Krakatoa. how loud is it? 172 dB wow. that is so loud. how far was the sound? The sound was 172 dB within a 100 mile radius, it circled the earth many times. thanks You're welcome.