Atmospheric effects on microphone array analysis of aircraft vortex sound

Details

• Creators:
  Wassaf, Hadi ; Harding, J. A. ; Wang, Frank
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.) ; L3 Communications, Billerica, Mass
• Subject/TRT Terms:
  • Vortices
  • Phased arrays
  • Acoustic emission
  • Sound
  • Microphones
• Publication/ Report Number:
  AIAA 2006-2539
• Resource Type:
  Proceedings
• Geographical Coverage:
  United States
• Corporate Publisher:
  American Institute of Aeronautics and Astronautics
• Abstract:
  This paper provides the basis of a comprehensive analysis of vortex sound propagation ; through the atmosphere in order to assess real atmospheric effects on acoustic array ; processing. Such effects may impact vortex localization accuracy and detection probability ; over longer distances. The paper shows that propagation through the atmosphere can ; significantly alter the propagation time of the rays from the source to the receiver from that ; which would be experienced in an ambient atmosphere. More importantly, it can also change ; the delay time between microphones on which the array processing is based. Implications of ; these results on the design and resolution of microphone arrays are discussed.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/8954/dot_8954_DS1.pdf
• File Type:
  [PDF - 453.52 KB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha-512:b5bae23fb2a8d1d935b4a7ae231be4e85529db28077cedc3ab783176d6a2727cec92b96456e2a3cd8bc1c96880c5e2e1e9180eb87836267af16d974650679d4e