Encyclopedia of Remote Sensing

2014 Edition
| Editors: Eni G. Njoku

Acoustic Waves, Propagation

  • Alain Weill
Reference work entry
DOI: https://doi.org/10.1007/978-0-387-36699-9_2

Synonyms

Acoustic propagation; Sound waves propagation

Definition

Propagation. Concerns acoustical wave transmission inside a solid, liquid, or gaseous physical medium without material entrainment.

Introduction

After a very simple description of acoustical geometric propagation and plane wave assumption at large distance from sources, we shall speak about acoustic absorption by the medium as a function of frequencies and medium parameters. Then we shall present Doppler shift, which is very fundamental for remote sensing techniques. We shall be in a position to discuss sound propagation in a stratified media having some mean properties variation as a function of distance of acoustic sources or receivers. This last question is very important for atmosphere and ocean remote sensing where acoustic ray tracing has to be performed to know how acoustic waves propagate and from what kind of target an acoustic signal comes.

Wave propagation

If a pure sound corresponds to a sinusoidal wave, a...

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Bibliography

  1. Brekhovskikh, L. M., and Lysanov, Y. P., 1990. Fundamentals of Ocean Acoustics, 2nd edn. Berlin: Springer, 270 pp.Google Scholar
  2. Ewing, M., and Worzel, J. L., 1948. Propagation of Sound in the Ocean. New York: Geological Society of America, Memoir 27.Google Scholar
  3. Flatté, S. M., Dashen, R., Munk, W. M., Watson, K. M., and Zacchariasen, F., 1979. Sound Transmission Through a Fluctuating Ocean. Cambridge: Cambridge University Press, 299 pp.Google Scholar
  4. Harris, C. M., 1966. Absorption of sound in air versus humidity and temperature. Journal of Acoustical Society of America, 40(1), 148–159.CrossRefGoogle Scholar
  5. Munk, W., 2002. Acoustic tomography. In Encyclopedia of Global Environmental Change. Chichester: Wiley Editor, Vol. 1, p. 161.Google Scholar
  6. Munk, W. H., and Forbes, A. M. G., 1989. Global ocean warming: an acoustic measure? Journal of Physical Oceanography, 19, 1765–1778.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Alain Weill
    • 1
  1. 1.Bur. JussieuLATMOS, Laboratoire Atmosphere Milieux Observations SpatialesParisFrance