Acoustic camera and beampattern

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Courtesy of Norsonic AS

Abstract—The wavenumber-frequency response of an array describes the response to an arbitrary plane wave both in time and space. When the input consists of a single monochromatic plane wave, the response of the array is referred to as the array pattern or beampattern. Through the design of the array our goal is to have a directivity of the array as high as possible in a given direction, while suppressing signals and noise from directions being different from our focused attention. The beampattern of an array is a key element in determining array performance, and is largely determined by the array geometry.

Index Terms—Array pattern, beampattern, beamforming, wavenumber-frequency space

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