How much will the intensity level of a sound change as its intensity goes from 8 x 10-5 W/m to 1 x 10-7 W/m? Step 1. What intensity ratio should you use in this situation? Intensity Ratio = W/m W/m Step 2. Factor the intensity ratio into powers of 2 and 10: Intensity Ratio = 2 x 10 = 2 x 10 Step 3. Use 10log10(ab) = 10log0(a) + 10log10(b) to expand 10log0 (Intensity Ratio) 10l0g10(Intensity Ratio) = 10log10 (2 2 =) +10log10 ( Step 4. Evaluate each log0 term (in same order as above). 10log0 (Intensity Ratio) = )( So, the intensity level will CHANGE by AIL = IL - IL = 10 ])+() (