Sökning: "equivalent sound pressure level"

Hittade 3 uppsatser innehållade orden equivalent sound pressure level.

1. 1. Computational sound propagation models: An analysis of the models Nord2000, CONCAWE, and ISO 9613-2 for sound propagation from a wind farm

   Magister-uppsats, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Jôse Lorena Guimarães da Silva; [2017]
   Nyckelord :Nord2000; CONCAWE; ISO 9613-2; noise propagation; noise wind turbines.;

   Sammanfattning : The recent goals from some countries to become renewable energy based and reduce carbon dioxide emissions have caused the wind industry to grow. Together, the size of the wind farms and the noise emission have grown, while the noise emission regulations have to be fulfilled. LÄS MER

3. 2. The effect on noise emission from wind turbines due to ice accretion on rotor blades

   Magister-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

   Författare :Peter Arbinge; [2012]
   Nyckelord :wind turbine; wind turbines; noise; sound; acoustics; acoustic; ice; icing; ice accretion; rotorblades; rotor blades; IEC 61400-11;

   Sammanfattning : Swedish EPA (Naturvårdsverket) noise level guide-lines suggest that equivalent A-weighted sound pressure levels (SPL) must not exceed 40 dBA at residents. Thus, in the planning of new wind farms and their location it is crucial to estimate the disturbance it may cause to nearby residents. LÄS MER

4. 3. MÄTNING AV LJUDIMMISSION FRÅN VINDKRAFT. VIDAREUTVECKLING AV METOD FÖR MÄTNING

   Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

   Författare :Jens Fredriksson; [2012]
   Nyckelord :;

   Sammanfattning : The Swedish government have a goal that wind turbines shall produce 30 TWh by the year 2020, compared to about 3,5 TWh produced in Sweden during 2010. To minimize the disturbance that wind turbines create the Swedish Environmental Protection Agency has stated a guideline value that noise from wind turbines at nearby residents shouldn’t exceed 40 dBA, at 8 m/s wind speed. LÄS MER