Keele CBT Presentations
The following list contains all six of Keele's CBT Power-Point presentations that he gave for his papers at the AES conventions and three supplementary posters.
 Paper 1: "The Application of Broadband Constant Beamwidth Transducer (CBT) Theory to Loudspeaker Arrays,"
 Paper 2: "Implementation of Straight-Line and Flat-Panel Constant Beamwidth Transducer (CBT) Loudspeaker Arrays Using Signal Delays," (Oct. 2002).
 Paper 3: "The Full-Sphere Sound Field of Constant Beamwidth Transducer (CBT) Loudspeaker Line Arrays."
 Paper 4: "Practical Implementation of Constant Beamwidth Transducer (CBT) Loudspeaker Circular-Arc Line Arrays." (Oct. 2003).
 Paper 5: "Ground-Plane Constant Beamwidth Transducer (CBT) Loudspeaker Circular-Arc Line Arrays." (Oct. 2005).
 Paper 6: "A Performance Ranking of Seven Different Types of Loudspeaker Line Arrays." (Nov. 2010).
Keele CBT Posters
The following posters are intended to be printed out on large-format 24" x 36" material. However they can be viewed quite easily on your computer by just simple pan and zoom operations to zero in on sections of interest.
 Poster 1: "A Brief Overview of CBT Theory." (Created Sept. 2008).
This poster presents a handy overview of CBT theory in an easily digestible form.
 Poster 2: "CBT36 Sound-Field Simulations." (Created Oct. 2011).
This very interesting poster presents a comparative simulation study of the vertical sound-fields generated by four different sound sources in free space and over a ground plane at 500 Hz, 2 kHz, and 8 kHz. Sources include a point source, a two-way system crossed over 2 kHz (2nd-order L-R filters), a 5ft-tall straight-line array, and a 5ft-tall 36°circular-arc CBT array. Of course, the CBT array comes out on top, big time!
 Poster 3: "Front Pages of Keele and US Navy CBT Papers." (Created Oct.) 2011).
This poster presents images of the front pages of all six of Keele's CBT Audio Engineering Society technical papers and all three of the original U.S. Navy Acoustical Society of America research papers arranged in a 3 x 3 matrix for a quick and convenient "look see."