Phys. Rev. Lett. 90, 254302 (2003) [4 pages]Coda-Wave Interferometry in Finite Solids: Recovery of P-to-S Conversion Rates in an Elastodynamic BilliardReceived 3 February 2003; published 27 June 2003 We study the temperature dependence of diffuse reverberant ultrasound in elastic bodies. Transient wave forms are found to undergo an almost pure dilation of 0.0277% per degree, related to the temperature dependence of wave speeds. The wave forms also suffer a distortion that, we argue, depends on the rate of conversion between the dilatational (P) and shear (S) waves. Distortion is found to scale in a manner consistent with theoretical arguments but also appears to be a function of the degree of ray chaos in the body, indicating that the mixing rates are slower in more regular bodies. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.254302
DOI:
10.1103/PhysRevLett.90.254302
PACS:
43.35.+d, 05.45.Mt, 05.60.Gg
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