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

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