b'Engineer Innovation | Energy & Utilities6.36 s [1800 - 3975 Hz] Max level: 52.4 dBdB 5252515150504949Distance: 99.000m wind48Figure 2: Simcenter Sound Camera - sound sources at nacelle and blade tip.7.38 s [1800 - 3975 Hz] Max level: 51.5 dBdB 5251515050494948Distance: 99.000m wind48Figure 3: Simcenter Sound Camerareflection and local turbulences sound sources.might start focusing on those tones,Motion, multi-body simulations of which may indeed ruin ones sleep. entire transmission can be performed. The level of detail allows the prediction Tonal noises typically come from theof noise and vibration by means of an gear set in the nacelle, from poweracoustics simulation. This helps ensure electronics, motors for changing theminimal noise levels in the design pitch position of the blades or the yawphase, prior to building a prototype. position of the nacelle, fans, etc. Understanding which parts of the windStill, with manufacturing tolerances, turbine generate the transient noises,wear and tear, and installation effects, it as well as possible specific frequencies,can still be potentially hard to get to the is a crucial step in addressing, or betterroot cause of noise. The Simcenter yet, avoiding noise complaints. Sound Camera hardware is the ideal tool for this, as it is quick and easy to How can we make sure these windsetup and delivers real-time visualization turbines arent noisy? of the main sound sources and their In the engineering process of wind- frequencies. As an example, we simply turbine gearboxes, predictiveput the Simcenter Sound Camera in the simulations are used today to assessback of the car and drove to the wind vibration levels. With Simcenter 3Dfarm of Sovet, a village in Belgium.22'