Analysis of Nonlinear Distortions in a Digital MEMS Microphone

Maziewski P, Banas J, Koszewski D, Stanczak D, Trella P. Analysis of Nonlinear Distortions in a Digital MEMS Microphone. In: AES Convention 148. Audio Engineering Society; 2020. Paper 582. Available from: https://aes.org/publications/elibrary-page/?id=20820

@inproceedings{Maziewski2020_20820,
  author = {Maziewski, Przemek and Banas, Jan and Koszewski, Damian and Stanczak, Dominik and Trella, Pawel},
  title = {{Analysis of Nonlinear Distortions in a Digital MEMS Microphone}},
  booktitle = {AES Convention 148},
  note = {Paper 582},
  year = {2020},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20820}
}

TY  - CPAPER
TI  - Analysis of Nonlinear Distortions in a Digital MEMS Microphone
AU  - Maziewski, Przemek
AU  - Banas, Jan
AU  - Koszewski, Damian
AU  - Stanczak, Dominik
AU  - Trella, Pawel
T2  - AES Convention 148
M1  - Paper 582
PY  - 2020
DA  - 2020/05/06
UR  - https://aes.org/publications/elibrary-page/?id=20820
PB  - Audio Engineering Society
LA  - en
AB  - MEMS microphone’s nonlinear distortions are exploited in so-called ultrasonic dolphin attacks. The paper presents an analysis of problematic nonlinearities. For this purpose, the theoretical model was used. It allows to specify the frequencies and amplitudes of these distortions. The effectiveness of the model was illustrated by computer simulations. Then acoustic tests were carried out in a quiet anechoic chamber using a MEMS microphone. During testing, an additional reference microphone was used, which allowed to reduce the impact of non-linearity of non-MEMS test configuration components. Tests illustrate the significant level of MEMS microphone’s nonlinear distortions. Some convergence of the theoretical model with results of laboratory tests with potential development directions was also shown.
ER  -