NASA NTRS · 20190001365
Low-Cost Phased Microphone Array Design for Moderate-Scale Aeroacoustics Tests
Abstract
A new wall-mounted phased microphone array was designed, built, and calibrated for testing in closed or open test section wind tunnels. Two configurations were evaluated - one with microphone plate flush with the tunnel surface and the other with microphone plate recessed behind a porous screen. The arrays were successfully operated to Mach number of 0.4 and were calibrated using an in-flow speaker source during a recent study at the AEDC NFAC 40- by 80-Ft Wind Tunnel at NASA Ames.
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Horne, Clifton, Burnside, Nathan. 2014-02-19. Low-Cost Phased Microphone Array Design for Moderate-Scale Aeroacoustics Tests. https://ntrs.nasa.gov/citations/20190001365
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