Infra-sound cancellation and mitigation in wind turbines

Nonlinear engineering: Modeling and application

article

Albert Boretti¹  Andrew Ordys²  Sarim Al Zubaidy³ 

[1] Department of Mechanical and Aerospace Engineering, Benjamin M. Statler College of Engineering and Mineral Resources, West Virginia University;Military Technological College;The University of Trinidad and Tobago

关键词: Wind turbines;    Infra sound;    Human perception;    Active noise cancellation;    Active noise mitigation;   

DOI  :  10.1515/nleng-2017-0071

来源: De Gruyter

【 摘 要 】

The infra-sound spectra recorded inside homes located even several kilometres far from wind turbine installations is characterized by large pressure fluctuation in the low frequency range. There is a significant body of literature suggesting inaudible sounds at low frequency are sensed by humans and affect the wellbeing through different mechanisms. These mechanisms include amplitude modulation of heard sounds, stimulating subconscious pathways, causing endolymphatic hydrops, and possibly potentiating noise-induced hearing loss. We suggest the study of infra-sound active cancellation and mitigation to address the low frequency noise issues. Loudspeakers generate pressure wave components of same amplitude and frequency but opposite phase of the recorded infra sound. They also produce pressure wave components within the audible range reducing the perception of the infra-sound to minimize the sensing of the residual infra sound.

【 授权许可】

Unknown