Implementation of Straight-Line and Flat-Panel Constant Beamwidth Transducer (CBT) Loudspeaker Arrays using Signal Delays

Keele Jr. DB(. Implementation of Straight-Line and Flat-Panel Constant Beamwidth Transducer (CBT) Loudspeaker Arrays using Signal Delays. In: AES Convention 113. Audio Engineering Society; 2002. Paper 5653. Available from: https://aes.org/publications/elibrary-page/?id=11236

@inproceedings{KeeleJr2002_11236,
  author = {Keele Jr., D. B. (Don)},
  title = {{Implementation of Straight-Line and Flat-Panel Constant Beamwidth Transducer (CBT) Loudspeaker Arrays using Signal Delays}},
  booktitle = {AES Convention 113},
  note = {Paper 5653},
  year = {2002},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=11236}
}

TY  - CPAPER
TI  - Implementation of Straight-Line and Flat-Panel Constant Beamwidth Transducer (CBT) Loudspeaker Arrays using Signal Delays
AU  - Keele Jr., D. B. (Don)
T2  - AES Convention 113
M1  - Paper 5653
PY  - 2002
DA  - 2002/10/06
UR  - https://aes.org/publications/elibrary-page/?id=11236
PB  - Audio Engineering Society
LA  - en
AB  - Conventional CBT arrays require a driver configuration that conforms to either a spherical-cap curved surface or a circular arc. CBT arrays can also be implemented in flat-panel or straight-line array configurations using signal delays and Legendre function shading of the driver amplitudes. Conventional CBT arrays do not require any signal processing except for simple frequency-independent shifts in loudspeaker level. However, the signal processing for the delay-derived CBT configurations, although more complex, is still frequency independent. This is in contrast with conventional constant-beamwidth flat-panel and straight-line designs which require strongly frequency-dependent signal processing. Additionally, the power response roll-off of the delay-derived CBT arrays is one half the roll-off rate of the conventional designs, i.e., 3- or 6-dB/octave (line or flat) for the CBT array versus 6- or 12-dB/octave for the conventional designs.
ER  -