Proceedings of the Acoustical Society of Korea Conference (한국음향학회:학술대회논문집)

The Acoustical Society of Korea (한국음향학회)
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EXAMINATIONS OF METHOD FOR CALCULATING LAE OF HELICOPTER NOISE

  • Matsui, Toshihito (Department of Environmental and Sanitary Engineering, Faculty of Engineering, Kyoto University) ;
  • Park, Young-Min (Department of Environmental and Sanitary Engineering, Faculty of Engineering, Kyoto University) ;
  • Takagi, Koichi (Department of Environmental and Sanitary Engineering, Faculty of Engineering, Kyoto University)
  • Published : 1994.06.01
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Abstract

The paper presents a simple method for calculating the sound exposure level (LAE) of helicopter noise. It is assumed that a helicopter is a nondirective point source and that A-weighted sound pressure level at an observation point can be expressed by an A-weighted power level and a simple function of the distance from the helicopter. We derived a formula for LAE by integrating the sound energy along a finite or an infinite flight segment. The values calculated form the formula agree well with the results of test flights in which three types of helicopters each were operated in three moving modes of approach, takeoff and level flyover.

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