What intensity to you mean?2.) A person standing 4.0 m from a wall shouts such that the sound strikes the wall with an intensity of 2.5 x 10 x 10 W/m . Assuming that the wall absorbs 20% of the incident energy and reflects the rest, what is the sound intensity level just before and after the sound is reflected?
I=2.5 x 10^-3 W/m^2 and I=2 x 10^-3 W/m^2
SL=10 log_10 (2.5 x 10^-3) dB re 1 w/m^2
SL=10 log_10 (2 x 10^-3) dB re 1 w/m^2