Synthesis of an inhomogeneous medium from its acoustic transmission response

Wapenaar, Kees

doi:10.1190/1.1620649

Cited by 113 publications

(95 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Rickett and Claerbout (1999) summarised the application of noise crosscorrelation in helioseismology and thus conjectured for the Earth that ''by cross-correlating noise traces recorded at two locations on the surface, we can construct the wave-field that would be recorded at one of the locations if there was a source at the other'' (Rickett and Claerbout, 1999). The conjecture was finally proven mathematically by Wapenaar (2003Wapenaar ( , 2004, Snieder (2004) and van-Manen et al (2005) for acoustic media, by van-Manen et al (2006) and Wapenaar and Fokkema (2006) for elastic media, and was demonstrated in laboratory experiments by Lobkis and Weaver (2001), Weaver and Lobkis (2001), Derode et al (2003) and Larose et al (2005). Thereafter these methods became common practise in seismology.…”

Section: Historical Backgroundmentioning

confidence: 97%

“…Hence, the resulting signal will approximate the Green's function between r 1 and r 2 , as if one of the receivers had actually been a source (Fig. 1b) (Wapenaar, 2003(Wapenaar, , 2004. We therefore refer to this Green's function as a seismogram from a ''virtual'' (imaginary) source at the location of one of the receivers (r 1 ).…”

Section: Theory and Methods Of Seismic Interferometrymentioning

confidence: 99%

“…The emergence of seismic interferometry theory (e.g. Wapenaar, 2003Wapenaar, , 2004Campillo and Paul, 2003;van-Manen et al, 2005van-Manen et al, , 2006van-Manen et al, , 2007Wapenaar and Fokkema, 2006;Slob et al, 2007;Curtis et al, 2009;Curtis and Halliday, 2010a,b;Wapenaar et al, 2011) allowed us to decode the information contained in the ambient noise wavefield to create a useful signal, in fact an artificial seismogram, from what used to be called noise. This new seismogram can then be used to image the subsurface of the Earth using traditional seismological tomographic or imaging methods.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Seismic interferometry and ambient noise tomography in the British Isles

Nicolson

Curtis

Baptie

et al. 2012

Proceedings of the Geologists' Association

View full text Add to dashboard Cite

Section: Historical Backgroundmentioning

confidence: 97%

Section: Theory and Methods Of Seismic Interferometrymentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Seismic interferometry and ambient noise tomography in the British Isles

Nicolson

Curtis

Baptie

et al. 2012

Proceedings of the Geologists' Association

View full text Add to dashboard Cite

“…The crosscorrelation approach has been applied successfully to helioseismic data [12,14]. Recently Claerbout's conjecture has been proven by the author [15,16]. The proof also explains the empirical observations of the numerical modeling studies.…”

mentioning

confidence: 89%

Retrieving the Elastodynamic Green's Function of an Arbitrary Inhomogeneous Medium by Cross Correlation

2004

Self Cite

View full text Add to dashboard Cite

A correlation-type reciprocity theorem is used to show that the elastodynamic Green's function of any inhomogeneous medium (random or deterministic) can be retrieved from the cross correlation of two recordings of a wave field at different receiver locations at the free surface. Unlike in other derivations, which apply to diffuse wave fields in random media or irregular finite bodies, no assumptions are made about the diffusivity of the wave field. In a second version, it is assumed that the wave field is diffuse due to many uncorrelated sources inside the medium.

show abstract

“…The main underlying assumption is that the ambient noise field is equipartitioned, that is, that the energy current is equal in all directions (Weaver & Lobkis 2001;Wapenaar 2003;Snieder 2004;Roux et al 2004). Fortunately this strong assumption can be relaxed in many situations.…”

Section: Theorymentioning

confidence: 99%

Deep ocean sound speed characteristics passively derived from the ambient acoustic noise field

Evers

Wapenaar

Heaney

et al. 2017

Geophysical Journal International

View full text Add to dashboard Cite

S U M M A R YThe propagation of acoustic waves in the ocean strongly depends on the temperature. Lowfrequency acoustic waves can penetrate the ocean down to depths where few in situ measurements are available. It is therefore attractive to obtain a measure of the deep ocean temperature from acoustic waves. The latter is especially true if the ambient acoustic noise field can be used instead of deterministic transient signals. In this study the acoustic velocity, and hence the temperature, is derived in an interferometric approach from hydrophone array recordings. The arrays were separated by over 125 km, near Ascension Island in the Atlantic Ocean, at a depth of 850 m. Furthermore, the dispersive characteristics of the deep ocean sound channel are resolved based on the retrieved lag times for different modes. In addition, it is shown how the resolution of the interferometric approach can be increased by cross correlating array beams rather than recordings from single-sensor pairs. The observed acoustic lag times between the arrays corresponds well to modelled values, based on full-wave modelling through best-known oceanic models.

show abstract

Synthesis of an inhomogeneous medium from its acoustic transmission response

Cited by 113 publications

References 12 publications

Seismic interferometry and ambient noise tomography in the British Isles

Seismic interferometry and ambient noise tomography in the British Isles

Retrieving the Elastodynamic Green's Function of an Arbitrary Inhomogeneous Medium by Cross Correlation

Deep ocean sound speed characteristics passively derived from the ambient acoustic noise field

Contact Info

Product

Resources

About