Titel: Measurements of Sound from Wind Turbines
Författare: Conny Larsson, Olof Öhlund
Utgivare: Uppsala University
Årtal: 2011
Ämnesord: sound, noise, refraction, wind turbine
Rapport via ScienceDirect
Sammanfattning: An extensive measurement program, with economical support from the Swedish Energy Agency, have been started up to measure the long-time meteorological effects on sound propagation from wind turbines at three sites in Sweden. The measurements will be performed continuously during 1-2 years. Sound propagation is studied in a 1) forest area, 2) over a water bay and 3) over heterogeneous terrain. The sites are representative for typical Swedish conditions, which are quite common on other geographical locations around the world. The first two of them are located in the southern part of Sweden and the third is located in the northern part of Sweden. The meteorological conditions change over the day and the year and vary a lot depending of the terrain conditions. Variations of the order of 20-25 dBA at the imission point for different weather conditions have been found in earlier investigations. Greatest variations of the immission levels have earlier been found between day and night for sources close to the ground. Variations of the same order have earlier been found during different parts of the year for sound propagation over sea.