Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Methods for Attenuation of Helicopter

Hamid Parhizkar; Ali Moradi; Alireza Hejazi zade

Volume 7, Issue 3 , September 2023, , Pages 69-84

https://doi.org/10.30699/jtae.2023.7.3.6

Abstract
  Helicopters can be a source of loud noise. The high production noise of helicopters makes them unsuitable for densely populated areas, especially in low-flying conditions. This study examines methods and offers solutions to reduce or eliminate the noise produced by helicopters. Several methods have been ...  Read More

Aerodynamics/Fluid Mechanics/Aeroacoustics/...
Methods for Attenuation of Unmanned Aerial Vehicle Noise

Mostafa Mahmoodi; Ali Moradi

Volume 6, Issue 2 , September 2022, , Pages 71-83

https://doi.org/10.22034/jtae.2022.316532.1215

Abstract
  Unmanned aerial vehicles (UAVs) like drones (quadcopters, hexacopters, octocopters, etc.) can be a source of significant acoustic noise. High noise makes them less suitable for use in densely populated urban areas, particularly during take-off, landing, and low-level flight, due to the noise annoyance. ...  Read More