TY - JOUR
T1 - A multilayered magneto-electro-elastic membrane for focused audible sound beam generated through ultrasonic pressure fields
AU - Sayin, Umut
AU - Guasch, Oriol
PY - 2011
Y1 - 2011
N2 - The generation of highly directive audible sound through ultrasonic pressure fields has some practical limitations due to high power consumption and strong focusing requirements. These limitations constitute a problem for including this technology in mobile devices with limited power and space. This paper offers construction of a new type of transducer specialized for these applications, which intends to tackle both limitations on power consumption and focusing. This is done through utilization of a multilayered membrane, which consists of piezoelectric and magnetostrictive materials that is exposed to a magnetic field for both, focusing and transduction purposes. Linear numerical simulations accounting for the interaction of the magneto-electro-elastic fields that provide the resonant frequency for ultrasonic transmission, and the optimum electromagnetic field for maximum curvature, are carried out using state-vector approach. Non-linear propagation of the ultrasound beam through the KZK equation is also included. A prototype transducer to check the validity of the observed results is under construction.
AB - The generation of highly directive audible sound through ultrasonic pressure fields has some practical limitations due to high power consumption and strong focusing requirements. These limitations constitute a problem for including this technology in mobile devices with limited power and space. This paper offers construction of a new type of transducer specialized for these applications, which intends to tackle both limitations on power consumption and focusing. This is done through utilization of a multilayered membrane, which consists of piezoelectric and magnetostrictive materials that is exposed to a magnetic field for both, focusing and transduction purposes. Linear numerical simulations accounting for the interaction of the magneto-electro-elastic fields that provide the resonant frequency for ultrasonic transmission, and the optimum electromagnetic field for maximum curvature, are carried out using state-vector approach. Non-linear propagation of the ultrasound beam through the KZK equation is also included. A prototype transducer to check the validity of the observed results is under construction.
UR - http://www.scopus.com/inward/record.url?scp=84866029511&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:84866029511
SN - 2221-3767
SP - 2467
EP - 2472
JO - Proceedings of Forum Acusticum
JF - Proceedings of Forum Acusticum
T2 - 6th Forum Acusticum 2011
Y2 - 27 June 2011 through 1 July 2011
ER -