Miniaturized Full-Range MEMS Speaker for In-Ear Headphones

Stoppel F, Fankhänel J, Giese T, Eisermann C, Pieper I, Lofink F. Miniaturized Full-Range MEMS Speaker for In-Ear Headphones. In: Express Paper. Audio Engineering Society; 2024. Paper 298. Available from: https://aes.org/publications/elibrary-page/?id=22756

@inproceedings{Stoppel2024_22756,
  author = {Stoppel, Fabian and Fankhänel, Johannes and Giese, Thorsten and Eisermann, Christian and Pieper, Isa and Lofink, Fabian},
  title = {{Miniaturized Full-Range MEMS Speaker for In-Ear Headphones}},
  note = {Paper 298},
  year = {2024},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=22756}
}

TY  - CPAPER
TI  - Miniaturized Full-Range MEMS Speaker for In-Ear Headphones
AU  - Stoppel, Fabian
AU  - Fankhänel, Johannes
AU  - Giese, Thorsten
AU  - Eisermann, Christian
AU  - Pieper, Isa
AU  - Lofink, Fabian
M1  - Paper 298
PY  - 2024
DA  - 2024/09/27
UR  - https://aes.org/publications/elibrary-page/?id=22756
PB  - Audio Engineering Society
LA  - en
AB  - This paper reports a highly miniaturized loudspeaker for in-ear applications. It is manufactured using MEMS (micro-electromechanical systems) technology, a technology that is well known e.g. from MEMS microphones and accelerometers. The speaker is based on a mechanically open design, featuring a perfectly decoupled piezoelectric bending actuator. To provide good acoustic sealing, the actuator is surrounded by an acoustic shield. Measurements performed on loudspeaker prototypes attached to an artificial ear simulator showed that despite the small size of only 2.4 x 2.4 mm, sound pressure levels of 105 dB can be achieved within the full audio range. Moreover, low total harmonic distortion (THD) of less than 0.4 % at 90 dB and 1 kHz have been observed.
ER  -