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The loudest sound that we can hear is about 130 decibels.
Is it not the description of the sound that the heart makes?
They are called Lubb Dubb
In my opinion it is the drums that have the loudest raw sound, but if you connect your guitar to an amplifier then the sound will have increased.
The loudest sound ever recorded are rock concert speakers.
The "lubb" sound is produced by the closing of the Atrioventricular (Bicuspid and Triscuspid) valves , while the "dupp" sound is produced by the closing of the Semilunar (Aortic and Pulmonary) valves.
At a very close distance to the spider you hear the loudest sound.
I believe the Saturn V moon rocket was the loudest man made sound.
The lubb sound happens when the ventricles relax and the AV valves close.
The "lubb" sound is produced when the atrioventricular valves in the heart close.
lub
The tricuspid and bicuspid or mitral valves.