Contribution
Acoular Workshop: Modelling flow environments for the correction of aeroacoustic microphone array measurements
* Presenting author
Abstract:
Flow-induced noise arises from the motion of air around solid bodies and plays an important role in research areas such as automotive, aerospace, and wind energy sciences. However, the airflow responsible for sound generation typically produces unwanted background noise, which masks the true acoustic emissions of the test item from measurement equipment. Thus, isolating the sound emitted by the test item is essential for obtaining reliable evaluations, which is pivotal in developing noise-reducing technologies for cars, airplanes, and wind turbines. A common solution involves using acoustic images computed via microphone arrays. These acoustic images help visualize and quantify the spatial distribution of sound across the test item, enabling precise assessment of acoustic emissions without contamination from background noise. This contribution explores commonly used strategies for applying flow environment corrections to microphone array measurements and provides examples from a wind tunnel experiment. Two open-source software packages, Acoular and AeroAcoustics.jl, are used interactively to demonstrate their interoperability and compare results.