12 // C OMSOL NE WS 2 0 1 1 ENERGY XI ENGINEERING CONSULTANTS LTD, EDINBURGH, UK Wind Turbine Noise Reduction Modeling of a megawatt wind turbine system enabled Xi Engineering Consultants to address a problematic tonal resonance with an innovative solution that minimized the cost of remedial work for their client. BY JENNIFER HAND N oise from wind farms falls into two categories: aerodynamic noise is cre- ated by the blades of a turbine swis

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