CONTINUOUS DETERMINATION OF THE AVERAGE SOUND VELOCITY OVER AN ARBITRARY PATH

Abstract

A reasonably accurate determination of the velocity of sound in the open air along a path of arbitrary length by some inexpensive means is the crux of sonic atmospheric sensing. At present, this is accomplished by measuring either time delays or phase differences of an acoustic signal. This paper explores the technique of phase measurement and proposes a direct approach to the problem of determining the sound speed within an arbitrary layer. By means of the phase technique, the initial conditions of the sound velocity and the vector wind may be determined. The temporal distribution of the sound speed is found from an equation for the average sound velocity along the paths between the sound source and two opposing transducers.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1966
Accession Number
AD0482327

Entities

People

  • Richard D. Low

Organizations

  • Atmospheric Sciences Laboratory

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Signals
  • Atmospheric Sciences
  • Climate Change
  • Electromagnetic Radiation
  • Electronic Equipment
  • Equations
  • Frequency
  • Measurement
  • Meteorology
  • New Mexico
  • Phase
  • Phase Measurement
  • Refractive Index
  • Transducers
  • Wind
  • Wind Velocity

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering