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A primary school teacher from Belfast holds the Guinness World Record for the loudest human voice, reaching 121.7 decibels. The loudest sound on earth was an exploding Saturn V rocket at 204 decibels, while the Krakatoa volcanic explosion in 1883 was the loudest accurately measured human sound.
There are a number of deafening sounds on earth. A nearby jackhammer breaking up concrete can generate noise at an unpleasant 100 decibels. Thunder can send sound waves to your ears at a level of 120 decibels.
But what about the human voice? Primary school teacher Annalisa Flanagan from Belfast, Northern Ireland earned a place in the Guinness Book of Records in a 1994 contest. To claim the world record, she (ironically) yelled “QUIET” so loud it recorded a incredible 121.7 decibels, which has the same quality as a jet engine.
Flanagan has since had his tonsils removed, so he’s reluctant to try to replicate or improve on his record-breaking cry. Her students rarely give her cause to raise her voice, but she’s not afraid to yell during the occasional hockey game.
Making a lot of noise:
Scientists say the loudest sound on earth is an exploding Saturn V rocket. It was measured at 204 decibels.
Sperm whales make sounds when echolocating at a level of 174 dBA.
In 1883, as the volcanic island of Krakatoa blew up, the explosion was heard thousands of miles away. Scientists think this is probably the loudest sound humans have ever measured accurately.
