Publication Date:
2017-11-16
Description:
Author(s): Sevan Harput, James McLaughlan, David M. J. Cowell, Pierre Gelat, Nader Saffari, Jia Yang, Omololu Akanji, Peter J. Thomas, David A. Hutchins, and Steven Freear Methods for generating acoustic fields, as in ultrasound scans, generally rely on a linear process within the transducer. In this study, an acoustic signal is generated using the n o n l i n e a r effects observed in granular chains via propagation of solitary waves. An analytical model is developed to simulate the behavior of a granular chain attached to an impedance-matching layer (which helps to deposit the ultrasonic energy into biological tissue). A prototype device with a chain of aluminum spheres and a vitreous-carbon matching layer demonstrates the feasibility of such systems for biomedical applications. [Phys. Rev. Applied 8, 054032] Published Wed Nov 15, 2017
Electronic ISSN:
2331-7019
Topics:
Physics
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