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Engineering Brief

In-Ear Headphone System with Piezoelectric MEMs Driver

Authors: Männchen, Andreas; Stoppel, Fabian; Beer, Daniel; Niekiel, Florian; Wagner, Bernhard

AES Convention 145 · Paper 469 · October 2018

Abstract

This article presents a prototype in-ear headphone system based on a previously disclosed piezoelectric MEMS driver technology (piezoMEMS). The centerpiece of the earphone is a 4 mm x 4 mm piezoMEMS chip loudspeaker that on its own achieves broadband sound pressure levels of up to 110 dB in an IEC 60318-4 ear simulator. A specifically designed enclosure allows for easy installation of the piezoMEMS driver and takes first steps in optimizing the acoustic performance. Furthermore, the system comprises a specially tailored amplifier as well as a dedicated signal processing concept. The article describes the ideas behind the system, discusses the particular challenges in designing the piezoMEMS earphone, shows measurement results, and, finally, discusses the vast opportunities for future research.

Details

Published in
AES Convention 145
AES Convention
145
Paper number
469
Publication date
October 6, 2018
Session subject
Posters: Recording and Production
Affiliation
Fraunhofer Institute for Digital Media Technology IDMT, Ilmenau, Germany; Fraunhofer Institute for Silicon Technology ISIT, Itzehoe, Germany (See document for exact affiliation information.)
Type
Engineering Brief