The comparisons are not based solely on manufacturer-provided data. Only 25 wind turbines met this criteria. The measure is useful because it can indicate how many of a specific turbine can be installed on a parcel before noise affects the site's neighbors. This is especially useful to electric utility engineers charged with determining the impact new wind turbines will have on their distribution lines and substations. Several figures of merit are given in the table, but the turbines are ranked by the degree peak power exceeds rated power.
Some wind turbines produce as much as three times their rated power during gusts.
For a more thorough explanation of these measures and a list of the turbines included point your web browser at Table 2. More information on wind energy.