PMID: 12765379May 27, 2003Paper

Elastic wave thermal fluctuations, ultrasonic waveforms by correlation of thermal phonons

The Journal of the Acoustical Society of America
Richard Weaver, Oleg Lobkis

Abstract

It is widely recognized that acoustic degrees of freedom coupled to a thermal bath have amplitudes which fluctuate with a mean square proportional to temperature; this is the basis for the Debye theory of the heat capacity of insulating solids. It is shown here that these elastic wave thermal phonons have correlation functions identical to the system's ultrasonic Green's function, and furthermore that thermal noise in ultrasonic detectors should have correlation functions equivalent to conventional waveforms obtained by active transmission and reception. This suggests the possibility of doing ultrasonics without a source. Theory for the identity is presented, and several room temperature laboratory confirmations are conducted in the frequency range 0.1-1.0 MHz. The thermal nature of the origin of these correlations is established by comparing their strength with theoretical expectations. Applications are discussed.

References

Sep 16, 2000·Physical Review Letters·R L Weaver, O I Lobkis
Oct 4, 2000·Physical Review Letters· de Rosny JM Fink
May 1, 2001·Physical Review Letters·R HenninoR L Weaver
Oct 3, 2001·Physical Review Letters·R L Weaver, O I Lobkis
Feb 21, 2000·Physical Review Letters·J de RosnyM Fink

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Citations

Dec 10, 2008·The Journal of the Acoustical Society of America·S E FriedPhilippe Roux
Apr 17, 2012·The Journal of the Acoustical Society of America·Michael J Buckingham
Aug 24, 2013·The Journal of the Acoustical Society of America·Stephanie E FriedW A Kuperman
Oct 10, 2009·The Journal of the Acoustical Society of America·Richard WeaverMichel Campillo
Apr 10, 2009·The Journal of the Acoustical Society of America·Oleg A Godin
Mar 14, 2007·The Journal of the Acoustical Society of America·Oleg A Godin
Feb 1, 2013·The Journal of the Acoustical Society of America·Richard L Weaver
Aug 17, 2010·The Journal of the Acoustical Society of America·Oleg A Godin
Dec 17, 2009·The Journal of the Acoustical Society of America·Oleg A Godin
Dec 3, 2008·The Journal of the Acoustical Society of America·S A AlbahraniE H Huntington
Apr 30, 2015·The Journal of the Acoustical Society of America·Andrey A AnosovVladimir V Klinshov
Feb 12, 2005·The Journal of the Acoustical Society of America·Philippe Roux, W A Kuperman
Feb 12, 2005·The Journal of the Acoustical Society of America·Karim G SabraW A Kuperman
Jul 16, 2005·The Journal of the Acoustical Society of America·Richard L Weaver, Oleg I Lobkis
Nov 2, 2019·The Journal of the Acoustical Society of America·Tsu Wei TanNikolay A Zabotin

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