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Design and Electroacoustic Analysis of a Piezoelectric MEMS In-Ear Headphone

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

Fulltext ()

Jot, J.-M. ; Audio Engineering Society -AES-:
AES International Conference on Headphone Technology 2019. Proceedings : August 27-29, 2019, San Francisco, CA, USA
New York, NY: AES, 2019
ISBN: 978-1-942220-29-9
DOI: 10.17743/aesconf.2019.978-1-942220-29-9
Paper 14
International Conference on Headphone Technology <2019, San Francisco/Calif.>
Conference Paper, Electronic Publication
Fraunhofer IDMT ()
Fraunhofer ISIT ()
in-ear applications; MEMS earphone; piezoelectric MEMS driver

This article takes an in-depth look at an in-ear headphone demonstrator with a piezoelectric MEMS driver. The MEMS transducer and the demonstrator system including earphone enclosure, signal processing, and application-specific amplifier are described. The main focus of this study lies on an exhaustive electroacoustic analysis of a MEMS earphone, comprising an electrical impedance measurement, various acoustical measurements, and an investigation of the thermal behavior of piezoelectric MEMS drivers. The results show the high potential of this technology for in-ear applications and promise even greater acoustic performance with future improvements.