About how many times more intense will the normal ear perceiver a sound of `10 ^(6) W //m^(2)` than one of `10^(9) W//m^(2)` ?

Explanation

`L_(1) = 10 log_(10) ((I_(1))/(I_(o)))`
= `10 log_(10) ((10^(-6))/(10^(-12))) = 60 dB`
`L_(2) = 10 log_(10) ((I_(2))/(I_(o)))`
= `10 log_(10) ((10^(-9))/(10^(-12))) = 30 dB`
`L_(2) = 2l_(2)`