Experimental investigation into infrasound and low-frequency noise radiation characteristics from large wind turbines

중대형 풍력터빈의 저주파 및 초저주파 소음 방사 특성에 대한 실험적 고찰

  • 이승엽 (부산대학교 공과대학 기계공학부) ;
  • 정철웅 (부산대학교 기계공학부) ;
  • 신수현 (부산대학교 공과대학 기계공학부) ;
  • 정성수 (한국표준과학연구원 기반표준부 유체유동/음향진동그룹) ;
  • 정완섭 (한국표준과학연구원 기반표준부 유체유동/음향진동그룹)
  • Published : 2007.11.15

Abstract

In this paper, characteristics of infrasound and low-frequency noise emission from large modern wind turbines are experimentally investigated. The sound measurement procedures of IEC 61400-11 and ISO 7196 are utilized to field test and evaluation of noise emission from each of 1.5 MW and 660 kW wind turbines using the stall regulation and the pitch control for the power regulation, respectively. It was found that the G-weighted SPLs of low-frequency noise including infrasound shows positive correlation with the wind speeds, irrespective of methods of power regulation. This highlights the potential complaint of local community against the infrasound and low-frequency noise of wind turbines. The comparison of measured data with the existing hearing thresholds and criteria curves shows that it is highly probable that the low-frequency noise from the 1.5 MW and 660 kW wind turbines in the frequency range over 30 Hz leads to the psychological complaint of ordinary adults, and that the infrasound in the frequency range from 5 Hz to 8 Hz causes the complaint by rattling the house fitting such as doors and windows.

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