Question

the decible level of discotheque is ________​

Answer 1

We know that Loudness of Sound is given by equation,

β=10log(

I

0

1

)dB

where I

0

=10

−12

Wm

−2

is the reference unit.

Intensity I∝a

2

where a = amplitude.

Solving we get, the amplitude of the instrument playing music to be reduced by a factor of 100.