Abstract
This Letter reports a technique for the imaging of acoustic nonlinearity. By contrasting the energy of the diffuse field produced through the focusing of an ultrasonic array by delayed parallel element transmission with that produced by postprocessing of sequential transmission data, acoustic nonlinearity local to the focal point is measured. Spatially isolated wave distortion is inferred without requiring interrogation of the wave at the inspection point, thereby allowing nonlinear imaging through depth.
- Received 14 February 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.144301
© 2014 American Physical Society
Focus
Making Invisible Cracks Visible
Published 3 October 2014
A new acoustic imaging technique could reveal previously invisible cracks in bridges or other infrastructure.
See more in Physics