Journal ArticleDOI
On diffuse waves in solid media
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In this article, a diffuse field in a solid medium is found to partition its energy between transverse and dilatational waves in a fraction R = 2(cd/ct)3.Abstract:
A diffuse field in a solid medium is found to partition its energy between transverse and dilatational waves in a fraction R = 2(cd/ct)3. Energy flow rates from a diffuse field into a surface transducer from dilatational, transverse, and surface waves are compared. The relevance of the diffuse field concept for acoustic emission is discussed.read more
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Journal ArticleDOI
Emergence of broadband Rayleigh waves from correlations of the ambient seismic noise.
TL;DR: In this paper, the authors demonstrate that coherent information about the Earth structure can be extracted from the ambient seismic noise using a cross-correlations of vertical component records of several days of seismic noise at different pairs of stations separated by distances from about one hundred to more than two thousand kilometers.
Journal ArticleDOI
Long-range correlations in the diffuse seismic coda.
Michel Campillo,Anne Paul +1 more
TL;DR: This seismological example shows that diffuse waves produced by distant sources are sufficient to retrieve direct waves between two perfectly located points of observation and has potential applications in other fields.
Journal ArticleDOI
On the emergence of the Green's function in the correlations of a diffuse field
Oleg I. Lobkis,Richard L. Weaver +1 more
TL;DR: It is shown that a diffuse field is not devoid of phase information, but has a correlation function equal to the Green's function, and the cross-correlation between diffuse signals in two transducers is very nearly equal to an impulse applied to the other.
Journal ArticleDOI
Transport equations for elastic and other waves in random media
TL;DR: In this paper, the authors derived and analyzed transport equations for the energy density of waves of any kind in a random medium, taking account of nonuniformities of the background medium, scattering by random inhomogeneities, polarization effects, coupling of different types of waves, etc.
Journal ArticleDOI
On the emergence of the Green's function in the correlations of a diffuse field: pulse-echo using thermal phonons.
Richard L. Weaver,Oleg I. Lobkis +1 more
TL;DR: In this paper, it was shown that the cross-correlation between diffuse signals in two transducers is very nearly equal to the direct response of one transducer to an impulse applied to the other.
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