'Single-sided' autofocusing of sound in layered materials
2002
A new technique—'single-sided' autofocusing—is proposed and its possible use for inspecting layered materials is surveyed. Based on linear acoustics and the recently developed mathematical theory of focusing, single-sided autofocusing answers the question, 'Given single-sided access, how does one focus sound to a point inside a one-dimensional layered medium at a specified time—given that the velocity profile is unknown?'
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