Presenter: Chris Bahr, Ph.D.
Description: In aeroacoustic testing, the determination of acoustic source locations in an experiment is often critical, as the sources must be located before they can be mitigated. One of the most common techniques used to determine source locations, known as beamforming, utilizes an array of microphones and acoustic source modeling.
In this presentation, the classic delay-and-sum (DAS) beamformer is discussed in both the time and frequency domains from a theoretical perspective. Common implementations of the beamformer as used in wind tunnel testing are then shown, with discussion of appropriate usage and corrections.