A multilayered magneto-electro-elastic membrane for focused audible sound beam generated through ultrasonic pressure fields

Umut Sayin, Oriol Guasch

Research output: Indexed journal article Conference articlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)2467-2472
Number of pages6
JournalProceedings of Forum Acusticum
Publication statusPublished - 2011
Event6th Forum Acusticum 2011 - Aalborg, Denmark
Duration: 27 Jun 20111 Jul 2011

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