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Related Experiment Video

Updated: Apr 17, 2026

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
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Magnetostrictive microelectromechanical loudspeaker.

Thorsten S Albach1, Reinhard Lerch1

  • 1University of Erlangen-Nuremberg, Chair of Sensor Technology, Paul-Gordan-Strasse 3-5, 91052 Erlangen, Germany.

The Journal of the Acoustical Society of America
|February 12, 2015
PubMed
Summary
This summary is machine-generated.

This study presents a novel microelectromechanical loudspeaker utilizing the magnetostrictive effect. Optimized designs achieve high sound pressure levels (SPL) and a wide frequency range for advanced audio applications.

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Area of Science:

  • Microelectromechanical Systems (MEMS)
  • Acoustics
  • Materials Science

Background:

  • Traditional loudspeakers face limitations in miniaturization and efficiency.
  • The magnetostrictive effect offers a unique mechanism for acoustic transduction.

Purpose of the Study:

  • To develop and characterize a novel microelectromechanical loudspeaker.
  • To investigate the performance of a magnetostrictive micro-loudspeaker.
  • To establish a simulation model for optimizing MEMS loudspeaker design.

Main Methods:

  • Fabrication of a microelectromechanical loudspeaker with a comb-structured monomorph bending cantilever membrane (16 mm²).
  • Utilized the magnetostrictive effect for sound generation.
  • Developed a coupled simulation model to predict sound pressure.
  • Experimental measurement of sound pressure level (SPL) and total harmonic distortion (THD).

Main Results:

  • Prototypes achieved a sound pressure level (SPL) of up to 102 dB at 450 Hz with 2% THD in a 2 cm³ volume.
  • The simulation model accurately reproduced experimental measurements.
  • Optimized designs predict a maximum SPL of 106 dB.
  • Achieved a -6 dB frequency range from 100 Hz to 2.6 kHz.

Conclusions:

  • The magnetostrictive microelectromechanical loudspeaker demonstrates promising performance for miniaturized audio devices.
  • The developed simulation model is effective for design optimization.
  • Further advancements can enhance SPL and broaden the frequency response.