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Design, fabrication, and customized driving of dielectric loudspeaker arrays

Klug, Florian and Endl, Christian and Solano Arana, Susana and Schlaak, Helmut F. (2019):
Design, fabrication, and customized driving of dielectric loudspeaker arrays.
In: Proceedings of SPIE, In: Smart Structures / NDE. Electroactive Polymer Actuators and Devices (EAPAD) 2019, Denver, Colorado, US, 3-7March 2019, 1096621, DOI: 10.1117/12.2515311,
[Conference or Workshop Item]

Abstract

The suitability for loudspeakers was already demonstrated at the beginning of the development of dielectric elastomer transducers. In contrast to the commonly used electrodynamic principle, which comes along with a variety of components like coils, magnets, springs and a complex system design, dielectric speaker can merely consist of a single membrane. Due to their inherent compliance, only electrodes are necessary to build a loudspeaker. Nevertheless, because of their non-linear actuation behaviour and high driving voltages they were no longer considered in research or commercial applications. Through further development of dielectric films, driving electronics for high voltages and specialized non-linear filters for equalization, these issues can now be addressed. Therefore, we propose new designs of flat dielectric speakers with modular size and adaptable shapes. Total sound pressure levels up to 120 db at 1 m distance, 12.4 kHz transmission range and total harmonic distortions lower than 2 % could be achieved by digital signal processing.

Item Type: Conference or Workshop Item
Erschienen: 2019
Creators: Klug, Florian and Endl, Christian and Solano Arana, Susana and Schlaak, Helmut F.
Title: Design, fabrication, and customized driving of dielectric loudspeaker arrays
Language: English
Abstract:

The suitability for loudspeakers was already demonstrated at the beginning of the development of dielectric elastomer transducers. In contrast to the commonly used electrodynamic principle, which comes along with a variety of components like coils, magnets, springs and a complex system design, dielectric speaker can merely consist of a single membrane. Due to their inherent compliance, only electrodes are necessary to build a loudspeaker. Nevertheless, because of their non-linear actuation behaviour and high driving voltages they were no longer considered in research or commercial applications. Through further development of dielectric films, driving electronics for high voltages and specialized non-linear filters for equalization, these issues can now be addressed. Therefore, we propose new designs of flat dielectric speakers with modular size and adaptable shapes. Total sound pressure levels up to 120 db at 1 m distance, 12.4 kHz transmission range and total harmonic distortions lower than 2 % could be achieved by digital signal processing.

Title of Book: Proceedings of SPIE
Volume: 1096621
Uncontrolled Keywords: electroactive polymers, dielectric elastomer transducer, fabrication, loudspeaker
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design > Microtechnology and Electromechanical Systems
Event Title: Smart Structures / NDE. Electroactive Polymer Actuators and Devices (EAPAD) 2019
Event Location: Denver, Colorado, US
Event Dates: 3-7March 2019
Date Deposited: 19 Aug 2019 08:52
DOI: 10.1117/12.2515311
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