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Using Acoustic Beamforming for Pass-By Noise Source Detection

This application note discusses a technique known as beamforming for determining noise location of passing vehicles. The technique has several challenges including simultaneous acquisition of a large sensor array, advanced signal processing and storage of extremely large data sets, and the environmental considerations required for operating outdoors on a test track. This application note recommends best practices for performing beamforming and walks through the complete system required from the test environment to the sensors to the math, analysis, and data storage with the goal of the reader being able to apply the technique.