The central theories behind low-frequency directionality with subwoofer clusters and arrays are well-known, but there are practical considerations that are essential to understand. This paper highlights key areas such as: the acoustic center, directionality of so-called omnidirectional sources, performance stage effects, and inter-unit decorrelation methods, primarily through the use of hemi-anechoic measurements with secondary analysis via electroacoustic simulations.
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https://aes2.org/publications/elibrary-page/?id=19180
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