1. The problem statement, all variables and given/known data I am given 5 frequencies but I would like to know how to calculate the power level for both ears just for one of the frequencies (1000Hz) to get a general idea for the rest. In this experiment, we used audio headsets and recorded the voltage and resistance for the left ear and the right ear at the threshold point. It was fun! so, for example, at 1000Hz, Left ear: Voltage: 1.469 Resistance: 158,000 (158k) Right ear: Voltage: 1.502 Resistance: 105,000 (105k) 2. Relevant equations I=(P)/4*pi*r^2 I is the intensity P is the power 3. The attempt at a solution My problem here is that I don't understand what to with this equation. I initially thought to re-arrange it to solve for Power, so P=I*4*pi*r^2 But then what exactly is Intensity? I really would like to understand and I appreciate any insight that may help me figure this out.