title: Ultrasonic radiation from wedges of cubic profile: Experimental results.
abstract: This paper presents experimental results demonstrating the increase in ultrasonic radiation obtained from a wedge of cubic profile relative to a plate of uniform thickness. The wedge of cubic profile provides high efficiency sound radiation matching layer from a mounted piezoelectric transducer into the surrounding air. Previous research on structures with indentations of power-law profile has focused on vibration mitigation using the so called "acoustic black-hole" effect, whereas here such structures are used to enhance ultrasonic radiation. The work provides experimental verification of the numerical results of Remillieux et al. (2014).
authors.affiliation: Geophysics Group (EES-17), MS D446, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. Electronic address: bea@lanl.gov.
authors.forename: Brian E
authors.initials: BE
authors.lastname: Anderson
authors.affiliation: Geophysics Group (EES-17), MS D446, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: Marcel C
authors.initials: MC
authors.lastname: Remillieux
authors.affiliation: Geophysics Group (EES-17), MS D446, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: Pierre-Yves
authors.initials: PY
authors.lastname: Le Bas
authors.affiliation: Geophysics Group (EES-17), MS D446, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Ulrich
authors.affiliation: Department of Robotics and Mechatronics, AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Krakow, Poland.
authors.forename: Lukasz
authors.initials: L
authors.lastname: Pieczonka
keywords: Acoustic–structure interaction; Air-coupled ultrasound; Piezoelectric transducers; Time-reversal acoustics