An acoustic transduction system has been designed which couples the sound field of two transducers in phase and produces a resultant acoustic radiation pattern which has a full 360 degree horizontal by 90+ degree vertical frequency invariant beamwidth. The system incorporates an acoustic lens, rather than a phased array or electronic technique, to couple the sound fields and produce the wide dispersion. The system is used in a loudspeaker to achieve a 360 degree sound field which is devoid of high frequency beam collapse, and combing.

Authors: Ferralli, Michael W.; Moulton, David
Affiliation: Phase Coherent Audio, Inc.,Girard, PA
AES Convention: 81 (November 1986) Paper Number: 2392
Publication Date: November 1, 1986
Subject: Audio Reproduction, Transducers, and Sound Reinforcement: Loudspeakers, Microphones, and Directivity

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