32. Implementation of Straight-Line and Flat-Panel CBT Loudspeakers and Constant Beamwidth Transducer (CBT) Loudspeaker Arrays Using Signal Delays

AES Convention: 113 Paper Number:5653
Publication Date: 2002-10-06

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.

Flat-Panel CBT Loudspeakers provide an innovative solution for audio reproduction, enhancing sound quality through advanced design and technology.

Click to Browse

Keele Jr., D. B. (Don); 2002; Implementation of Straight-Line and Flat-Panel Constant Beamwidth Transducer (CBT) Loudspeaker Arrays using Signal Delays [PDF]; Harman / Becker Automotive Systems, Martinsville, IN; Paper 5653; Available from: https://aes2.org/publications/elibrary-page/?id=11236