SKEW HORN FOR A LOUDSPEAKER

The skewed horn shown here in cross section has a flat mouth that can be flush-mounted in a wall or baffle. The patent includes polar response plots showing that a symmetrical pair of horns can deliver wide horizontal coverage over a range of two octaves or more. The intended usage is home theater surround sound, although a number of other applications come to mind. In short, this appears to be a well-designed device that meets its performance goals. However, the patent claims are broadly written and do not describe any specific geometry. Instead they postulate a throat plane that forms an angle with a mouth plane, the two being connected by an elongated duct "...such that sound waves generated by said transducer propagate unreflected down the elongated duct." It seems to me that thisdescription applies equally well to a planar-face, dual-horn tweeter manufactured by University Loudspeakers around 1950.-GLA