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Distributed Sound Systems for Sloped Floors and Ceilings

Two methods are given for the design of distributed sound systems for rooms whose floor and ceiling are not parallel. It is first shown that the SPL contours on a plane inclined from the plane normal to a loudspeaker axis can be approximated by concentric circles displaced up the plane. This is used as the basis for the development of a design method giving approximately the same loudspeaker density (per coverage circle area) in the listening plane and hence an approximately constant uniformity of coverage. A second method is examined for which the density (per unit area) is constant at the ceiling. Both methods can be extended to cases of non-planar floors and ceilings.

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