Question

The intensity of sound at a calm place should be

Answer 1

I guess it must be 0 decibals.
Cause it is the quitest sound anyone can actually hear.

Answer 2

The intensity of the sound at a calm place should be about 30 decibels to 50 decibels.

A decibel is a unit that is used to measure the frequency of sound that is made. The quietest or the calmest decibel of sound that can be made is 0 decibels. The normal voice intensity of a conversation is about “70 decibels”.

According to the human hearing scenario, 100 decibels is said to be a loud noise and about 120 decibels can damage one’s ears.