Curved CBT arrays need no frequency-dependent signal processing
Evidence
CBT arrays do not require any signal processing except for simple frequency-independent shifts in loudspeaker level. This is in contrast with conventional constant-beamwidth flat-panel and straight-line designs, which require strongly frequency-dependent signal processing. — David Howard, Jamie Angus, coustics and Psychoacoustics, 2902
Categorization
Category: Contrarian or Surprising Claims
- QUESTION: How does simple geometric curvature plus static level shading deliver what otherwise needs complex DSP? Worth chasing the math.
Related
- CBT arrays need only frequency-independent level shifts, unlike conventional line arrays (similarity 0.93)
- CBT arrays achieve constant beamwidth using only level shifts, not complex frequency-dependent processing. (similarity 0.86)
- Curved, Legendre-shaded line arrays exploit floor reflections to maintain constant beamwidth at all frequencies (similarity 0.81)
- CBT arrays taper drive levels from center to edges for constant beamwidth (similarity 0.81)
- Legendre-tapered drive levels give spherical-cap arrays constant beamwidth with low side lobes (similarity 0.80)
- Legendre-tapered spherical transducer caps achieve constant beamwidth above a cut-off frequency (similarity 0.80)