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Magnetostrictive microelectromechanical loudspeaker

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2013 English Publisher:Acoustical Society of America (ASA)Journal:The Journal of the Acoustical Society of America, volume 134, pages 4,372-4,380 (issn: 0001-4966, eissn: 1520-8524,

Authors: Reinhard Lerch; Thorsten Albach;

doi: 10.1121/1.4824815

pmid: 25669248

Magnetostrictive microelectromechanical loudspeaker

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Abstract

A microelectromechnical-loudspeaker based on the magnetostrictive effect is presented. The membrane consists of a comb structure of monomorph bending cantilevers with an area of about 16 mm2. Prototypes generate a sound pressure level (SPL) of up to 102 dB at 450 Hz with a total harmonic distortion of 2% inside a 2 cm3 measurement volume. The fabrication process of the device as well as a coupled simulation model to calculate its sound pressure is introduced. The model reproduces the measurements and is employed to further optimize the loudspeaker membrane. As a result, a computed maximum SPL of 106 dB has been achieved with a −6 dB frequency range extending from 100 Hz to 2.6 kHz.

Related Organizations

University of Erlangen-Nuremberg
Germany

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