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Proceedings Paper

Acoustic transducer based on dielectric elastomers
Author(s): Christian Graf; Jügen Maas
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Paper Abstract

Dielectric electroactive polymers are thin films based on elastomeric material coated with compliant and conductive electrodes. By applying an electrical field, the polymer performs large deformations, which can be utilized to generate sound waves. When using such kind of electrostatic loudspeakers, no additional resonating sound boxes are required and the vibrating mass is very lightweight, resulting in an excellent impulse and wide-band frequency response. For the loudspeaker's operation both an electrical bias voltage and a mechanical bias stress have to be applied. In this contribution different possibilities are presented to generate the mechanical bias stress. The design of an appropriate power electronics for the acoustic transducer, which is build of standard components, is also described. Finally, the loudspeaker concepts are evaluated by experiments in an anechoic room.

Paper Details

Date Published: 3 April 2012
PDF: 11 pages
Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 83401G (3 April 2012); doi: 10.1117/12.913270
Show Author Affiliations
Christian Graf, Ostwestfalen-Lippe Univ. of Applied Sciences (Germany)
Jügen Maas, Ostwestfalen-Lippe Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 8340:
Electroactive Polymer Actuators and Devices (EAPAD) 2012
Yoseph Bar-Cohen, Editor(s)

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