Details
| Original language | English |
|---|---|
| Title of host publication | Tagungsband DAGA 2020 |
| Subtitle of host publication | 46. Deutsche Jahrestagung für Akustik (mit Sonderteil zu "50 Jahre DAGA") |
| Pages | 627-630 |
| Publication status | Published - 2020 |
| Event | DAGA 2020: 46. Deutsche Jahrestagung für Akustik (cancelled) - Hannover, Germany Duration: 16 Mar 2020 → 19 Mar 2020 |
Abstract
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Tagungsband DAGA 2020: 46. Deutsche Jahrestagung für Akustik (mit Sonderteil zu "50 Jahre DAGA"). 2020. p. 627-630.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research
}
TY - GEN
T1 - On the Design of a MEMS Microphone Array for a Mobile Beamforming Application
AU - Poets, Alexander
AU - Schlieper, Roman
AU - Preihs, Stephan
AU - Peissig, Jürgen Karl
PY - 2020
Y1 - 2020
N2 - Considering the extensive use of smartphones and their outstanding camera capabilities these days, it’s desirable to record a high-quality audio signal in tandem with capturing video, e.g. at a rock concert. For a rather immersive sound experience when playing back smartphone-recorded material it’s mandatory to preserve the acoustic environment’s spatial properties. On that note, a design of a miniature microphone array to be rear-mounted on a smartphone is proposed. In the course of this work, we’ll focus on the development of a proper microphone arrangement that meets application-specific requirements. Therefore, several geometries are evaluated in terms of directivity index, half-power beam width and side lobe attenuation using a simulation-driven approach. Once a suitable geometry has been found, the actual sensor placement is determined by thinning the array using a genetic algorithm. Then, a prototype of the design is implemented utilizing digital MEMS microphones. Finally, a spatial filter (beamformer) is applied to the raw sensor data in order to allow the capture of multi-channel audio and the suppression of interfering background noise.
AB - Considering the extensive use of smartphones and their outstanding camera capabilities these days, it’s desirable to record a high-quality audio signal in tandem with capturing video, e.g. at a rock concert. For a rather immersive sound experience when playing back smartphone-recorded material it’s mandatory to preserve the acoustic environment’s spatial properties. On that note, a design of a miniature microphone array to be rear-mounted on a smartphone is proposed. In the course of this work, we’ll focus on the development of a proper microphone arrangement that meets application-specific requirements. Therefore, several geometries are evaluated in terms of directivity index, half-power beam width and side lobe attenuation using a simulation-driven approach. Once a suitable geometry has been found, the actual sensor placement is determined by thinning the array using a genetic algorithm. Then, a prototype of the design is implemented utilizing digital MEMS microphones. Finally, a spatial filter (beamformer) is applied to the raw sensor data in order to allow the capture of multi-channel audio and the suppression of interfering background noise.
UR - https://pub.dega-akustik.de/DAGA_2020/data/daga20_proceedings.pdf
M3 - Conference contribution
SP - 627
EP - 630
BT - Tagungsband DAGA 2020
T2 - DAGA 2020
Y2 - 16 March 2020 through 19 March 2020
ER -