most of human ears cannot hear sound of intensity less than,
a) 1 w/m2
b) 5 w/m2
c) 10 w/m2
d) 100 w/m2

Dear student
The threshold intensity  that is the minimum intensity that a human can hear is  10-12 w/m2 . Sound having intensity greater than this intensity can be heard by normal human ear.Theintensity of even 1w/m2 is painful to the ear.Regards

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