Loudspeaker array designs using drivers positioned to improve directionality

Abstract

This paper provides a study of the design methodology used in the development of a central loudspeaker cluster for stadiums and arenas. The design criteria is compared with the actual constructed results to describe the effective use of the concept and use in future designs. The methodology for the design is based on the paper published in the Journal of the Audio Engineering Society in April of 1990 by Jefferson Harrell and Elmer Hixson. The paper by Harrell and Hixson discussed horizontal and vertical directionality of multidriver loudspeaker arrays when spaced a calculated distance from each other. This paper provides a demonstration of these concepts with systems recently completed at the Bryce Jordan Center at Penn State University, and Sun Devil Stadium at Arizona State University. The methodology was applied to an array with transducer spacings greater than 2 m and improved control of frequencies down to 50 Hz. Digital control of audio provides loudspeaker array control and alignment capabilities not previously possible through analog techniques. The paper discusses adjustment of the arrays installed at the above-mentioned facilities.