Three-dimensional identification of flow-induced noise sources with a tunnel-shaped array of MEMS microphones

Zhou, Yinshi; Valeau, Vincent; Marchal, Jacques; Ollivier, François; Marchiano, Régis

doi:10.1016/j.jsv.2020.115459

Cited by 15 publications

(3 citation statements)

References 32 publications

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“…While the most advanced surface-mounted MEMS microphones provide the necessary small size, sensitivity, and dynamic range, their bandwidth is in the range of consumer MEMS microphones: up to 20 kHz [6], limited to 6 kHz for those with higher dynamic range [4] or with a maximum of 10 kHz in multi-sensor arrays [7]. Aeromic's new dual-frequency piezoelectric MEMS microphones combine in each sensor two thin triangular structures similar in appearance, but different in size.…”

Section: Introductionmentioning

confidence: 99%

“…The surface mount package has dimensions of 3.50 mm x 2.65 mm x 0.98 mm [9]. Furthermore, an array of 256 MEMS microphones has even been successfully deployed for aero-acoustic measurements and used in open wind tunnel tests [7]. In this case the sensors are custom-made and grouped in arrays of 8 synchronized elements that are connected to a PC to measure up to 10 kHz.…”

Section: Introductionmentioning

confidence: 99%

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Electronics for Piezoelectric Mems Microphone Arrays Applied to Aero-Acoustic Characterization of Structures in Wind Tunnel Tests

Báez,

García-Souto,

Cavarischia

et al. 2023

10th ECCOMAS Thematic Conference on Smart Structures and Materials

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The electronic instrumentation system for a MEMS microphone array for wind tunnel tests (WTT) is presented: the array on a flexible PCB, the integration with the frontend electronics, the selection of components, the characterization of the electronics and the multiplexing strategy to concentrate analog channels in the data acquisition system (DAQ). This work is carried out in the framework of the Aeromic project, with new piezoelectric MEMS dual frequency LF (30 kHz resonance) and HF (200 kHz resonance) sensors. The front-end and signal conditioning are based on commercial components, including integrated circuits for amplification and buffering, filtering, sample & hold, and multiplexing. The design and characterization of these electronic components are discussed. A modular design based on an 8-microphone array focuses on 4 analog channels of the DAQ through 8 analog multiplexers which is scalable to 80 sensors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electronics for Piezoelectric Mems Microphone Arrays Applied to Aero-Acoustic Characterization of Structures in Wind Tunnel Tests

Báez,

García-Souto,

Cavarischia

et al. 2023

10th ECCOMAS Thematic Conference on Smart Structures and Materials

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show abstract

“…In aeroacoustic testing, one must distinguish between in-flow sensors, which are mounted on any kind of surface that is exposed to the flow-field, and out-of-flow sensors, which are mounted out of the flow-field of an open jet wind tunnel. A recent example with out-of-flow sensors by Zhou et al [ 4 ] shows the application of a 256 MEMS microphone array in an open jet wind tunnel for aeroacoustic measurements. In the current paper, only the in-flow placement of acoustic sensors and their unique problems are discussed.…”

Section: Introductionmentioning

confidence: 99%

Road to Acquisition: Preparing a MEMS Microphone Array for Measurement of Fuselage Surface Pressure Fluctuations

et al. 2021

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Preparing and pre-testing experimental setups for flight tests is a lengthy but necessary task. One part of this preparation is comparing newly available measurement technology with proven setups. In our case, we wanted to compare acoustic Micro-Electro-Mechanical Systems (MEMS) to large and proven surface-mounted condenser microphones. The task started with the comparison of spectra in low-speed wind tunnel environments. After successful completion, the challenge was increased to similar comparisons in a transonic wind tunnel. The final goal of performing in-flight measurements on the outside fuselage of a twin-engine turboprop aircraft was eventually achieved using a slim array of 45 MEMS microphones with additional large microphones installed on the same carrier to drawn on for comparison. Finally, the array arrangement of MEMS microphones allowed for a complex study of fuselage surface pressure fluctuations in the wavenumber domain. The study indicates that MEMS microphones are an inexpensive alternative to conventional microphones with increased potential for spatially high-resolved measurements even at challenging experimental conditions during flight tests.

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Virtual Augmentation of the Beamforming Array Based on a Sub-cross-spectral Matrix Computation for Localizing Stationary Signal Noise Sources

Singh,

Mimani

2024

Acoust Aust

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Three-dimensional identification of flow-induced noise sources with a tunnel-shaped array of MEMS microphones

Cited by 15 publications

References 32 publications

Electronics for Piezoelectric Mems Microphone Arrays Applied to Aero-Acoustic Characterization of Structures in Wind Tunnel Tests

Electronics for Piezoelectric Mems Microphone Arrays Applied to Aero-Acoustic Characterization of Structures in Wind Tunnel Tests

Road to Acquisition: Preparing a MEMS Microphone Array for Measurement of Fuselage Surface Pressure Fluctuations

Virtual Augmentation of the Beamforming Array Based on a Sub-cross-spectral Matrix Computation for Localizing Stationary Signal Noise Sources

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