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Compact Stereo Loudspeakers with Dipole Processing

Compact stereo loudspeakers have become increasingly popular. One category of these use side-firing left and right transducers featuring a certain spatial effect due to the transducers’ directivity at high frequencies. The presented technique increases the spatial effect by controlling directivity at low/medium frequencies, where the transducers have low directivity. A multi-band filter network is used to increase directivity at these frequencies by partially reproducing the stereo signal with dipole directivity pattern. The problem of interference between left and right direct and dipole reproduced sound is addressed.

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AES - Audio Engineering Society