Title :
High frequency propagation measurements in microstructured solids
Author :
Dawson, A. ; Harris, P. ; Young, R. ; Gouws, G.
Author_Institution :
Ind. Res. Ltd., Lower Hutt
Abstract :
High frequency ultrasonic wave propagation in an immersed porous aluminium sheet is modelled and the results verified by experiment using focused broadband 50, 100 and 175 MHz waves. For colinear (pores extending from face to face of the sheet) samples the microstructure facilitates transmission at angles beyond 35deg, which is far greater than the critical angles for a homogeneous solid, and at a constant velocity.
Keywords :
aluminium; high-frequency effects; porous materials; sheet materials; ultrasonic propagation; ultrasonic transmission; Al; colinear samples; focused broadband waves; frequency 100 MHz; frequency 175 MHz; frequency 50 MHz; high-frequency propagation measurement; homogeneous solid; immersed porous aluminium sheet; microstructured solids; ultrasonic transmission; ultrasonic wave propagation; Acoustic propagation; Aluminum; Circuits; Frequency measurement; Frequency response; Lighting; Microstructure; Solids; Transducers; UHF propagation; microstructure; porous; propagation;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0019
