Wind Turbine Tonalities Reduction

Wind turbines experience tonalities, which are sounds at discrete frequencies peaking above the broadband noise, mainly originating from the gearbox vibrations then transmitted to sound emission areas, such as the tower or the blades. If a tonality occurs, the resulting tonal noise is particularly unpleasant, that is why the standards (IEC 61400-11) assign a so-called tonality surcharge to the determined broadband sound power level for tonal components, which can be up to +6dB. With this surcharge, the authorized limits for noise emissions or the contractually agreed noise level are often exceeded.

What we do

For fixed frequency tonalities, Micromega designs and manufactures dedicated Tuned Mass Absorbers (TMA), which are mounted on the wind turbine gearbox torque arms in order to prevent these vibrations from converting to sound in emission areas and propagating to the wind turbine surrounding area.

advantages

 

  • Add-on to the gear box
  • Less complaints from people in the neighborhood.

 USE CASES

 

Wind Turbine Tonalities Reduction

Wind turbines experience tonalities, which are sounds at discrete frequencies peaking above the broadband noise, mainly originating from the gearbox vibrations then transmitted to sound emission areas, such as the tower or the blades. If a tonality occurs, the resulting tonal noise is particularly unpleasant, that is why the standards (IEC 61400-11) assign a so-called tonality surcharge to the determined broadband sound power level for tonal components, which can be up to +6dB. With this surcharge, the authorized limits for noise emissions or the contractually agreed noise level are often exceeded.

For fixed frequency tonalities, Micromega designs and manufactures dedicated Tuned Mass Dampers (TMA), which are mounted on the wind turbine gearbox torque arms in order to prevent these vibrations from reaching the sound emission areas.

Contact Us

MICROMEGA DYNAMICS

Parc Industriel de Noville-les-Bois
Rue du Trou du Sart, 10
B-5380 Fernelmont, Belgium

V.A.T: BE 0466034916
p. +32 (0)81 24 81 00
f. +32 (0)81 24 81 01