Definition of Coda wave interferometry
Coda wave interferometry is an ultrasound technique for detection of weak and local changes in complex inhomogeneous media. Sound waves that travel through a medium are scattered multiple times by heterogeneities in the medium, or boundaries in a sample of limited size, and generate slowly decaying waves, called coda waves.
Despite their noisy and chaotic appearance, coda waves are highly repeatable such that if no change occurs in the medium over time, the waveforms are identical. If a change occurs, such as a crack in the medium, the change in the multiple scattered waves will result in an observable change in the coda waves.
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Frequently asked questions
What is Coda wave interferometry?
Coda wave interferometry is an ultrasound technique for detection of weak and local changes in complex inhomogeneous media.