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Not only can baleen whales emit calls that travel farther than any other voice in the animal kingdom, these giants of the deep also create the loudest vocalisations of any creature on earth: the call of a blue whale can reach 180 decibels – as loud as a jet plane, a world record.
Top 10 Loudest Animals
Known for their haunting, lion-like roars, black howler monkeys are considered the loudest land animal in the world. Their calls can be heard up to three miles away and can reach 140 decibels. (A jet engine at takeoff is about 150 decibels—loud enough to rupture eardrums.)
If we suppose that the same fraction of a supernova’s energy is converted to sound, and a supernova releases 1044 joules, That means that about 1044/(840 billion) = 1032 Joules of sound energy, thirty-two orders of magnitude greater than 120 dB, or about 440 decibels.
1100 dB is the volume level at which the shockwave compresses the air to a density sufficient to make micro black holes the size of a neutron. 724 dB is the volume level of a shockwave which compresses air to a compact mass of neutrons, with density the same as a neutron star.
To travel to us from outer space, the wave must be able to travel through regions of space which are essentially vacuum (nothing there). Sound cannot do this, as it requires a medium to propagate in, so we would not be able to hear the explosion.
Sound itself can only be transmitted through a medium and so in space we cannot hear a supernova. However since a supernova is a giant explosion triggered by the final death throes of a massive star, if we could hear it, we would hear an incredibly loud blast.
Given that there are many different types of stars that nova, give upper and lower bounds. That loudest sound is about 194 dB at 1 atmosphere: it is the maximum deviation from the ambient pressure to a vacuum. So, to answer the question, 194 dB.
Originally Answered: How loud is a supernova explosion? Sound doesn’t travel in space. If you were close enough to a supernova to hear anything you would be dead. So, it really doesn’t matter.