title: Time reversal reconstruction of finite sized sources in elastic media.
abstract: The ability of the time reversal process to reconstruct sources of finite size relative to a wavelength is investigated. Specifically the quality of the spatial reconstruction of a finite sized source will be presented through the use of time reversal experiments conducted on an aluminum plate. The data presented in the paper show that time reversal can reconstruct a source equally well regarding less of its size, when the source is a half wavelength or less in size. The quality of spatial reconstruction when the source is larger than a half wavelength progressively decreases with the size of the source.
authors.affiliation: Acoustics Research Group, Department of Physics and Astronomy, Brigham Young University, N283 Eyring Science Center, Provo, Utah 84602, USA. bea@byu.edu
authors.forename: Brian E
authors.initials: BE
authors.lastname: Anderson
authors.forename: Michele
authors.initials: M
authors.lastname: Griffa
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Ulrich
authors.forename: Paul A
authors.initials: PA
authors.lastname: Johnson
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D000535:Aluminum; D003198:Computer Simulation; D004548:Elasticity; D004867:Equipment Design; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D013016:Sound; D013997:Time Factors; D014159:Transducers
chemical_list: D000535:Aluminum