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Published on: January 7, 2019
Broadband EMFi-based transducers for ultrasonic air applications
Joao L Ealo1, Fernando Seco, Aantonio R Jimenez
1Insituto de Automática Industrial, Consejo Superior de Investigaciones Cientificas, Arganda del Rey, Madrid, Spain. jealo@iai.csic.es
Summary
Electromechanical film (EMFi) offers a versatile material for creating customizable ultrasonic air transducers. Its broadband capabilities and ease of use enable precise characterization for various applications.
Area of Science:
- Materials Science
- Acoustics
- Transducer Technology
Background:
- Electromechanical film (EMFi) presents a novel material for ultrasonic applications.
- Existing ultrasonic transducers often lack customizability and broadband frequency range.
Purpose of the Study:
- To investigate the potential of EMFi for developing broadband ultrasonic transducers for air applications.
- To provide theoretical and experimental data for end-users of EMFi-based sensors.
Main Methods:
- Characterization of EMFi properties including frequency response, dynamic mass, Young's modulus, bandwidth, and sensitivity.
- Development of an electromechanical dynamical model for EMFi transducers.
- Empirical analysis of the acoustic response and directivity of EMFi-based sources.
Main Results:
- EMFi exhibits a wide usable frequency range, suitable for broadband applications.
- The film behaves as an ideal piston-like acoustic source, allowing accurate prediction of transducer characteristics.
- Characterization data (frequency response, sensitivity, etc.) were obtained for end-user needs.
Conclusions:
- EMFi is a promising material for self-made, customizable ultrasonic sensors.
- The findings support the development of transducers for complex geometries and field applications.
- This research is a foundational step towards fully customizable ultrasonic transducers.
