A Bi-Directional Line-Source Loudspeaker with Von Braunmühl and Weber Baffle
Ordinary line-source loudspeakers, with enclosed boxes, have approximately circular horizontal polar characteristics at low and medium frequencies. In most speech reinforcement applications, however, it is the forward radiation that is wanted, that in other directions merely increasing the reverberant sound level, leading usually to reduced intelligibility and a smaller margin against howl-back.
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