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
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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.About:
This article is published in Ultrasonics.The article was published on 2002-05-01. It has received 483 citations till now. The article focuses on the topics: Green's function.read more
Citations
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Journal ArticleDOI
Processing seismic ambient noise data to obtain reliable broad-band surface wave dispersion measurements
G. D. Bensen,Michael H. Ritzwoller,M. P. Barmin,Anatoli L. Levshin,Fan-Chi Lin,Morgan P. Moschetti,Nikolai M. Shapiro,Yingjie Yang +7 more
TL;DR: Proxy curves relating observed signal-to-noise ratios to average measurement uncertainties show promise to provide useful expected measurement error estimates in the absence of the long time-series needed for temporal subsetting.
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
Extracting the Green's function from the correlation of coda waves: A derivation based on stationary phase
TL;DR: An alternative derivation of passive imaging of the ballistic wave that is not based on normal modes is presented, showing that the global requirement of the equipartitioning of normal modes can be relaxed to the local requirement that the scattered waves propagate on average isotropically near the receivers.
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
Green's function representations for seismic interferometry
Kees Wapenaar,Jacob T. Fokkema +1 more
TL;DR: In this article, it was shown that the acoustic Green's function between any two points in the medium can be represented by an integral of crosscorrelations of wavefield observations at those two points.
References
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BookDOI
Review of Progress in Quantitative Nondestructive Evaluation
TL;DR: The Review of Progress in Quantitative NDE (ROPQN) as mentioned in this paper is the world's leading conference in reporting annually new research and development results in quantitative NDE and promotes communication between the research and engineering communities and emphasize current reporting of work in progress.
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
Review of progress in quantitative NDE: Williamsburg, VA, USA, 21–26 June 1987
Journal ArticleDOI
Ultrasonics without a source: thermal fluctuation correlations at MHz frequencies.
Richard L. Weaver,Oleg I. Lobkis +1 more
TL;DR: It is argued that acoustic thermal fluctuations, with displacement amplitudes of 3 fm, contain substantial ultrasonic information and it is shown that the noise autocorrelation function is the waveform that would be obtained in a direct pulse/echo measurement.
Journal ArticleDOI
Robust acoustic time reversal with high-order multiple scattering
TL;DR: The first experiments showing the reversibility of transient acoustic waves through high-order multiple scattering by means of an acoustic time-reversal mirror are reported, with the observed resolution one-sixth of the theoretical limit for the mirror's aperture.