Figure 5

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Geometrical parameters for the plane-wave + piston edge-wave model. (a) The plane wave component exists if the projection, xproj., onto the baffle of a receiver position, x, falls inside the piston, as is the case for position x1 but not for x2. (b) The edge wave uses a local spherical coordinate system, (r,θ,φ), for each position, xe, along the piston edges.
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