Parameters influencing focalization spot in time reversal of acoustic waves

Harald Zophoniasson; Christian Bolzmacher; Moustafa Hafez

doi:10.1117/12.2178963

21 May 2015 Parameters influencing focalization spot in time reversal of acoustic waves

Harald Zophoniasson, Christian Bolzmacher, Moustafa Hafez

Proceedings Volume 9517, Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems; 95171S (2015) https://doi.org/10.1117/12.2178963
Event: SPIE Microtechnologies, 2015, Barcelona, Spain

Abstract

Time reversal is an approach that can be used to focus acoustic waves in a particular location on a surface, allowing a multitouch tactile feedback interaction. The spatial resolution in this case depends on several parameters, such as geometrical parameters, frequency used and material properties, described by the Lamb wave theory. This paper highlights the impact of frequency, geometrical parameters such as plate thickness and transducer’s surface on the focused spot dimensions. In this paper a study of the influence of the plate’s thickness and the frequency bandwidth used in the focusing process is presented. It is also shown that the dimension of the piezoelectric diaphragms used has little influence on the spatial resolution. Resonant behavior of the plate and its implication on focus point dimension and focalization contrast were investigated.

Citation Download Citation

Harald Zophoniasson, Christian Bolzmacher, and Moustafa Hafez "Parameters influencing focalization spot in time reversal of acoustic waves", Proc. SPIE 9517, Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems, 95171S (21 May 2015); https://doi.org/10.1117/12.2178963

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available