Premium
Sound wave channeling near–critical sulfurhexafluoride (SF 6 )
Author(s) -
Schlamp Stefan,
Rösgen Thomas
Publication year - 2003
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200310487
Subject(s) - critical distance , speed of sound , sound (geography) , curvature , wavelength , sound speed gradient , physics , critical frequency , isothermal process , acoustics , mechanics , optics , acoustic source localization , sound power , geometry , geophysics , thermodynamics , mathematics , ionosphere
Strong density and sound speed gradients exist in near–critical isothermal fluid columns under gravity. The sound speed profile has a minimum, allowing table–top sound channeling experiments. The three characteristic length scales (ray curvature, correlation length of critical fluctuations, wavelength) can be changed independently by adjusting the temperature, frequency, and the strength of the gravitational field.