a) Suppose the sound pressure level at a distance of 100 m from a single wind turbine is 55 dB. What is the sound power level of the turbine and what are the sound pressure levels at distances of 300, 500, and 1000 m? Assume an absorption coefficient of 0.005.
b) A single turbine has a sound power level of 104 dB. What are the sound pressure levels at a distance of 300, 500, and 1000 m for 2, 5, and 10 of these turbines located close together? Assume an absorption coefficient of 0.005.