Danish regulation of low frequency noise from wind turbines

Abstract

The Danish statutory order on wind turbine noise was revised in order to establish new rules for low frequency noise [1]. The new regulation entered into force January 1st, 2012, and it applies to wind turbines notified to the municipalities from this date. The new regulation complements the previous noise limits for wind turbines with a new mandatory limit for the low frequency noise, which is 20 dB A-weighted level of the calculated indoor sound level in the 1/3-octave bands 10 - 160 Hz. The purpose of the new regulation is to ensure that neither the usual noise nor the low frequency noise will annoy the neighbours when the wind turbines start to operate.