spherical sound waves are emitted uniformly in all direction

spherical sound waves are emitted uniformly in all directions

Solution

Inensity of spherical sound wave

I=P/4pir² = 25/4pi*2,5²

I=0.3182 W/m²

Sound level

B=10Log(I/I_o) =10Log(0.3183/10^-12)

B=115.02 dB