Optical Measurement of the Speed of Sound in Air Over the Temperature Range 300-650 K

Abstract

Using laser-induced thermal acoustics (LITA), the speed of sound in room air (1 atm) is measured over the temperature range 300-650 K Since the LITA apparatus maintains a fixed sound wavelength as temperature is varied, this temperature range simultaneously corresponds to a sound frequency range 10-15 MHz. The data are compared to a published model and typically agree within 0.1-0.4% at each of 21 temperatures.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2000
Accession Number
ADA377223

Entities

People

  • G. C. Herring
  • R. J. Balla
  • Roger C. Hart

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Barometric Pressure
  • Crossings
  • Data Analysis
  • Fluid Mechanics
  • Frequency
  • Laser Beams
  • Lasers
  • Measurement
  • Optical Detectors
  • Sound Waves
  • Temperature Gradients
  • Ultrasounds
  • Wave Packets
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Combustion science or combustion engineering.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers