The maintenance of constant directivity with frequency in high-frequency exponential horns is quite difficult. Two main sound industry solutions are the multicell and radial/sectoral horns. While the multicell exhibits fairly constant directivity, both designs suffer from mid/high-frequency polar lobing and midrange narrowing, and the radial shows continually decreasing vertical beamwidth as frequency increases. A new series of horns which optimally joins a modified conical horn with an exponential throat section corrects these problems, while offering very well behaved polar patterns and constant directivity up to 16 kHz.
Keele, Jr., D. B. (Don)
Affiliation: ELECTRO-VOICE, INC., BUCHANAN, MI
AES Convention: 51 (May 1975) Paper Number: 1038
Publication Date: May 1, 1975
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