Abstract
A ceiling-mounted loudspeaker (10) includes upper and lower sound-directing structures (12,14) having walls (22,24) acting as a radial horn (26) to provide a wide included angle of coverage for sound energy generated by a loudspeaker driver assembly (40) having a piston (30) for directing generated sound energy upwardly into the horn. The lower structure (14) further has a continuously convex bottom (80) configured and dimensioned to define a diffraction path for at least some of the sound energy exiting the outlet mouth (26b) of the radial horn, so that the convex bottom acts as a downwardly-directed diffractor. The radial horn (26) and the convex bottom (80) together produce an oblate spheroid of sound energy affording a substantially uniform amplitude of sound within a large finite horizontal plane at the level of a listener.
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