Methods to Improve the Horizontal Pattern of a Line Array Module in the Midrange Band

This paper reviews methods for modeling the vertical directivity of the frequency range from 200 Hz to 1 kHz in line array configurations. It describes the advantages and disadvantages of the following concepts: the horn, the ,,VAlignment", the flat alignment and the partial coverage of the speakers. We will shed light on the interrelationship between the angle of two conus speakers and the resulting directivity. Symmetrical and asymmetrical configurations of mid-range drivers and horns are compared. We will outline a procedure to combine these solutions for superior results. One main result will be the desired match of midsection's directivity with the directivity of hf-waveguide section. A concept for building systems with variable directivity over the whole frequency range will be drafted.