For acoustic arrays (microphones or loudspeakers), the main beam width of the radiation pattern is determined by the spacing between the elements in terms of lambda. Thus area coverage depends upon frequency. We have demonstrated that by controlling the spacing and frequency response of each element in an array, constant directivity of the main lobe over a wide frequency range can be achieved. Large powers can be achieved with relatively low energy densities at each element.

Authors: Harrell, Jefferson A.; Hixson, Elmer L.
Affiliation: The University of Texas, Austin, TX
AES Convention: 87 (October 1989) Paper Number: 2845
Publication Date: October 1, 1989
Subject: Acoustics of Loudspeaker Arrays

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