Principles, Practice, and Progress of Noise Reduction in Airplanes

Abstract

Basic concepts are described of the characteristics of sound waves. Frequency of the sound wave depends on the frequency of the source which generates the wave. Observations were made to determine the effect of different sources of noise in aircraft. Soundproofing methods and systems were designed to minimize the intensity of noise. Sound absorbing qualities of a number of materials were examined. Methods of calculating the noise reduction are outlined.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1940
Accession Number
ADA800871

Entities

People

  • Albert London

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Acoustic Insulation
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustics
  • Aircrafts
  • Airframes
  • Airplanes
  • Analyzers
  • Materials
  • Measurement
  • Mufflers
  • Noise Reduction
  • Propeller Noise
  • Thermal Conductivity
  • Transmission Loss

Readers

  • Acoustics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Calculus or Mathematical Analysis