Reduction of nonlinear distortion in condenser microphones using a simple post-processing technique
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00380487" target="_blank" >RIV/68407700:21230/25:00380487 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1121/10.0035579" target="_blank" >https://doi.org/10.1121/10.0035579</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1121/10.0035579" target="_blank" >10.1121/10.0035579</a>
Alternative languages
Result language
angličtina
Original language name
Reduction of nonlinear distortion in condenser microphones using a simple post-processing technique
Original language description
In this paper, an approach for effectively reducing nonlinear distortion in single-backplate condenser microphones is introduced, i.e., most microelectromechanical systems (MEMS) microphones, studio recording condenser microphones, and laboratory measurement microphones. This simple post-processing technique can be easily integrated on external hardware such as an analog circuit, microcontroller, audio codec, digital signal processing unit, or within the Application Specific Integrated Circuit chip in a case of MEMS microphones. It effectively reduces microphone distortion across its frequency and dynamic range, and relies on a single parameter, which can be derived from either the microphone's physical parameters or a straightforward measurement presented in this paper. An optimal estimate of this parameter achieves the best distortion reduction, whereas overestimating it never increases distortion beyond the original level. The technique was tested on a MEMS microphone. The findings indicate that for harmonic excitation, the proposed technique reduces the second harmonic by approximately 40 dB, leading to an effective reduction in the total harmonic distortion. The efficiency of the distortion reduction technique for more complex signals is demonstrated through two-tone and multitone experiments, where second-order intermodulation products are reduced by at least 20 dB.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20201 - Electrical and electronic engineering
Result continuities
Project
<a href="/en/project/GC23-07621J" target="_blank" >GC23-07621J: Otoacoustic emissions in normal cochlea and cochlea with endolymphatic hydrops: modeling and experiments</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
The Journal of the Acoustical Society of America
ISSN
0001-4966
e-ISSN
1520-8524
Volume of the periodical
157
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
699-705
UT code for WoS article
001417104200007
EID of the result in the Scopus database
2-s2.0-85217019325