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Acoustic waveguide contours that approximate either or both of the Elliptic Cylinder and the Prolate Spheroidal coordinate systems that allows for a more4 Sep 2006 Image 1: The 1" exit waveguide is stock Oblate spheroid shape, with a 1/2 round radius at the mouth The 2" exit waveguide is a compound Fall 2010. Building Oblate Spheroid Waveguides Far and away the most difficult project I've done to date. Article By Jeff Poth. Difficulty Level. This article is about 7 May 2013 Using a 3D CAD program called Solidworks I was able to model my Oblate Spheroidal horn profile using the equation for the curve. I set up the Recently it has been suggested that there is not enough concise information as to how to actually construct an oblate spheriod (OS) waveguide. Lots of people are experimenting with waveguides and constant directivity loudspeakers . An oblate spheroid (which is the natural shape of the earth and other. 29 Dec 2010 An oblate spheroid is the Rolex of waveguides and horns. It is the ideal choice for high frequency compression drivers where sound quality and 5 Jun 2017 about waveguides and horns that are not in fact correct. .. the Prolate Spheroidal (PS) waveguide takes a square cylindrically curved wave-. main families of horns. • Salmon family (exponential, hypex, etc.) • Tractrix, Kugelwellen and Spherical. • conical. • oblate spheroidal. • Le Cleac'h. 70