Determine the sound power level of a wind turbine located on a ridge 5,000 feet away from a residence with a sound pressure reading of 42 dB measured outside a building.
What will be an ideal response?
Locating the wind turbine on a ridge develops a spherical sound propagation pattern so the equation to determine the sound power level at the source would be; 
. Distance for this equation is measured in meters so the distance needs to be converted from feet to meters. Converting feet to meters; 3.25 feet = 1 meter Distance from the sound measurement instrument to the wind turbine would be; 5,000 ft/(3.25 ft/m) = 1,538.5 m.
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What will be an ideal response?
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