Digital signal processing made constant-directivity array loudspeakers practical and popular

Evidence

One way of reducing the effect of spatial aliasing is to use directive loudspeakers instead of point sources as the array elements. If one uses directive sources, their polar patterns will act as a form of spatial filter. That is, the off-axis side lobes will be reduced by the off-axis reduction in sound level that a directive source affords. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2907 (#expands, via linked claim)

Categorization

• XREF: connects to: Fully steerable array loudspeakers that stabilize phantom images are technically feasible but commercially absent; Constant Beamwidth Transducer loudspeakers produce astonishingly uniform sound level across listening distance.; Legendre-tapered spherical transducer caps achieve constant beamwidth above a cut-off frequency (+3 more)

Broader Connections

• Larger speaker size relative to wavelength enables higher directivity #expands (0.75)
• Directive loudspeaker elements act as spatial filters reducing array side lobes #expands (0.72) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2907