Signal conditioning for reducing total harmonic distortion in buckling dielectric elastomer loudspeakers

Michael Gareis; Jürgen Maas

doi:10.1117/12.2614371

20 April 2022 Signal conditioning for reducing total harmonic distortion in buckling dielectric elastomer loudspeakers

Michael Gareis, Jürgen Maas

Proceedings Volume 12042, Electroactive Polymer Actuators and Devices (EAPAD) XXIV; 120420F (2022) https://doi.org/10.1117/12.2614371
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

Dielectric elastomers (DE) are capable of high deformations at fast rates and thus, have inspired many loudspeaker designs. In particular, the previously introduced buckling DE-transducers (BDET) seems promising due to its low structural complexity. Due to electromechanical and geometrical nonlinearities, high total harmonic distortion (THD) in the lower end of the spectrum compromises its capability. Here, a method is developed to be run on an audio DSP to reduce the THD of the BDET by preconditioning the signal. Acoustic measurements are conducted and critically discussed. The study brings down one drawback of the BDET and thus increases its competitiveness.

Conference Presentation

Citation Download Citation

Michael Gareis and Jürgen Maas "Signal conditioning for reducing total harmonic distortion in buckling dielectric elastomer loudspeakers", Proc. SPIE 12042, Electroactive Polymer Actuators and Devices (EAPAD) XXIV, 120420F (20 April 2022); https://doi.org/10.1117/12.2614371

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