1. The problem statement, all variables and given/known data Person A, who is 1.5 meters away from me is speaking to me at a decibel level of 25dB. How loud does person B, who is 15 meters away from me need to speak in decibels to submit me to the same intensity of sound? 2. Relevant equations Ia/Ib=rb^2/ra^2 ∆dB=10log(Ia/Ib) 3. The attempt at a solution I figured I should start by figuring out the intensity of sound I would be experiencing if someone way 1.5m away from me and speaking at 25dB however, I can't seem to find a way to acount for the distance between me and person A. Any Ideas on how to start? Thanks.