Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering |
| Editors | Tyler Dare, Stuart Bolton, Patricia Davies, Yutong Xue, Gordon Ebbitt |
| Pages | 4724-4732 |
| Number of pages | 9 |
| ISBN (electronic) | 9781732598652 |
| Publication status | Published - 1 Aug 2021 |
| Event | 50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021 - Washington, United States Duration: 1 Aug 2021 → 5 Aug 2021 |
Publication series
| Name | Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering |
|---|---|
| ISSN (Print) | 0736-2935 |
Abstract
Acoustic impedance tubes are commonly used to measure a test specimen's acoustic characteristics such as reflection factor, absorption coefficient, or acoustic impedance. Micro-Electro-Mechanical Systems (MEMS) microphones are recently widely used in various acoustic applications, especially in array configurations due to their small size, low costs, and high sensitivity. This paper presents the development of an acoustic impedance tube with an inner diameter of 8 mm, equipped with 16 bottom port MEMS microphones covering an operating frequency range between 20 Hz and 20 kHz. The microphones are connected via 1 mm drillings to the tube. The system evaluation is based on the measurements of 3 standard test specimens, the rigid termination, and two different empty closed tubes. Furthermore, it was investigated how the number of microphones affects the measurement result. It has been shown that reliable measurement results can be obtained even without prior calibration of the microphones, although the number of microphones has to be reduced for higher frequencies.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
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Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering. ed. / Tyler Dare; Stuart Bolton; Patricia Davies; Yutong Xue; Gordon Ebbitt. 2021. p. 4724-4732 (Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - High-frequency acoustic impedance tube based on MEMS microphones
AU - Schlieper, Roman
AU - Gnadeberg, Thure
AU - Li, Song
AU - Preihs, Stephan
AU - Peissig, Jürgen
N1 - Funding Information: This work is supported by Huawei Innovation Research Program project (HIRP FLAGSHIP).
PY - 2021/8/1
Y1 - 2021/8/1
N2 - Acoustic impedance tubes are commonly used to measure a test specimen's acoustic characteristics such as reflection factor, absorption coefficient, or acoustic impedance. Micro-Electro-Mechanical Systems (MEMS) microphones are recently widely used in various acoustic applications, especially in array configurations due to their small size, low costs, and high sensitivity. This paper presents the development of an acoustic impedance tube with an inner diameter of 8 mm, equipped with 16 bottom port MEMS microphones covering an operating frequency range between 20 Hz and 20 kHz. The microphones are connected via 1 mm drillings to the tube. The system evaluation is based on the measurements of 3 standard test specimens, the rigid termination, and two different empty closed tubes. Furthermore, it was investigated how the number of microphones affects the measurement result. It has been shown that reliable measurement results can be obtained even without prior calibration of the microphones, although the number of microphones has to be reduced for higher frequencies.
AB - Acoustic impedance tubes are commonly used to measure a test specimen's acoustic characteristics such as reflection factor, absorption coefficient, or acoustic impedance. Micro-Electro-Mechanical Systems (MEMS) microphones are recently widely used in various acoustic applications, especially in array configurations due to their small size, low costs, and high sensitivity. This paper presents the development of an acoustic impedance tube with an inner diameter of 8 mm, equipped with 16 bottom port MEMS microphones covering an operating frequency range between 20 Hz and 20 kHz. The microphones are connected via 1 mm drillings to the tube. The system evaluation is based on the measurements of 3 standard test specimens, the rigid termination, and two different empty closed tubes. Furthermore, it was investigated how the number of microphones affects the measurement result. It has been shown that reliable measurement results can be obtained even without prior calibration of the microphones, although the number of microphones has to be reduced for higher frequencies.
UR - http://www.scopus.com/inward/record.url?scp=85117389896&partnerID=8YFLogxK
U2 - 10.3397/IN-2021-2810
DO - 10.3397/IN-2021-2810
M3 - Conference contribution
AN - SCOPUS:85117389896
T3 - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
SP - 4724
EP - 4732
BT - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
A2 - Dare, Tyler
A2 - Bolton, Stuart
A2 - Davies, Patricia
A2 - Xue, Yutong
A2 - Ebbitt, Gordon
T2 - 50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
Y2 - 1 August 2021 through 5 August 2021
ER -