Question

If the intensity of sound is increased by a factor of 30, by how many decibels in the sound level increased

Answer 1

Answer:

Explanation:

The intensity of sound is increased by factor of 30.

Let I be the intensity of previous sound.

then, a/c to above line , intensity of recent sound , I' = 30I 

we know, 

for case 1 :- when intensity of sound is I, 

 ......(1)

case 2 :- when intensity of sound is I',

 ......(2)

now, increased in sound level = 

= 

= 

=

= 14.77dB