MEASUREMENTS OF THE RADIATED NOISE FROM SAILPLANES

Abstract

The noise associated with a flight vehicle is generated by two distinct type sources: (1) the propulsion system and (2) the aerodynamic noise associated with movement of the vehicle through the atmosphere. The minimum noise will be radiated when the propulsion noise is eliminated. Measurements were taken of the noise radiated from three sailplanes in order to define the aerodynamic noise and to determine its relation to aircraft size and velocity. The report presents the results obtained from one microphone and relates the overall sound pressure level (SPL) to aircraft parameters.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1970
Accession Number
AD0709689

Entities

People

  • David L. Smith
  • E. R. Hotz
  • R. D. Talmadge
  • R. P. Paxson

Organizations

  • Flight Dynamics Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aerodynamic Noise
  • Air Force
  • Aircrafts
  • Altitude
  • Ambient Noise
  • Amplifiers
  • Band Spectra
  • Data Acquisition
  • Detection
  • Flight Paths
  • Gliders
  • Instrumentation
  • Measurement
  • Noise
  • Radiated Noise
  • Sound Pressure
  • Tape Recorders

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Fluid Dynamics.