Constant Beamwidth Transducer loudspeakers produce astonishingly uniform sound level across listening distance.
Evidence
I have experienced several CBT designs and they all deliver on the promise. One is able to start at a large distance, walk towards the loudspeaker, finally stand adjacent to it, and the sound level hardly changes. It defies instinct. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1294
Categorization
Category: Factual Claims
- CANDY: A striking, instinct-defying demo fact: walking toward a CBT speaker barely changes the level.
Related
- Constant-beamwidth-transducer speaker arrays hold stable loudness across listening distance (similarity 0.91)
- Constant beamwidth transducers deliver uniform sound levels over large areas (similarity 0.91)
- CBT arrays taper drive levels from center to edges for constant beamwidth (similarity 0.84)
- Curved, Legendre-shaded line arrays exploit floor reflections to maintain constant beamwidth at all frequencies (similarity 0.82)
- Curved and Legendre-shaded loudspeaker lines use the floor reflection to achieve uniform broadband coverage. (similarity 0.81)
- CBT arrays achieve constant beamwidth using only level shifts, not complex frequency-dependent processing. (similarity 0.79)
- Legendre-tapered spherical transducer caps achieve constant beamwidth above a cut-off frequency (similarity 0.79)
- Legendre-tapered drive levels give spherical-cap arrays constant beamwidth with low side lobes (similarity 0.79)
- Loudspeakers perform best only free-standing or flush-mounted in a boundary (similarity 0.78)
- Digital signal processing made constant-directivity array loudspeakers practical and popular (similarity 0.78)
Broader Connections
- Digital signal processing made constant-directivity array loudspeakers practical and popular
#expands(0.82) — David Howard, Jamie Angus, coustics and Psychoacoustics, 2486 - Loudspeaker arrays can create private sound zones within one large listening area.
#expands(0.80) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1908 - Loudspeakers and rooms function together as a single audible system
#expands(0.75) — Toole, Floyd E, Sound reproduction- the acoustics and…, 471 - Wide-dispersion speakers plus room reflections create listener envelopment.
#expands(0.72) — Toole, Floyd E, Sound reproduction- the acoustics and…, 449