Fun fact! Decibel is a logarithmic scale. This means an increase of 10 dB is a doubling in strength.
It's impossible to get a sound louder than about 200 dB on Earth: this is because a soundwave is a series of peaks and troughs of air compression, and around 200 dB you hit COMPLETE VACUUM in the troughs.
So, decibels are a measure of energy.. 400 dB is around 10^28. By the Atomic Rockets Boom Table, the dinosaur-killer impact was merely 10^23.
400 dB is "all the oceans flash boil off the planet and then the crust melts". This rabbit just destroyed all life on earth with a noise equivalent to an exaton of TNT. Aliens on pluto are getting woken up going "what the fuck was that light?"


