Circular Loudspeaker Arrays with Controllable Directivity

Møller M, Olsen M, Agerkvist FT, Dyreby J, Munch GK. Circular Loudspeaker Arrays with Controllable Directivity. In: AES Convention 128. Audio Engineering Society; 2010. Paper 8012. Available from: https://aes.org/publications/elibrary-page/?id=15309

@inproceedings{Moller2010_15309,
  author = {Møller, Martin and Olsen, Martin and Agerkvist, Finn T. and Dyreby, Jakob and Munch, Gert Kudahl},
  title = {{Circular Loudspeaker Arrays with Controllable Directivity}},
  booktitle = {AES Convention 128},
  note = {Paper 8012},
  year = {2010},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15309}
}

TY  - CPAPER
TI  - Circular Loudspeaker Arrays with Controllable Directivity
AU  - Møller, Martin
AU  - Olsen, Martin
AU  - Agerkvist, Finn T.
AU  - Dyreby, Jakob
AU  - Munch, Gert Kudahl
T2  - AES Convention 128
M1  - Paper 8012
PY  - 2010
DA  - 2010/05/06
UR  - https://aes.org/publications/elibrary-page/?id=15309
PB  - Audio Engineering Society
LA  - en
AB  - Specific directivity patterns for circular arrays of loudspeakers can be achieved by utilizing the concept of phase modes, which expands the directivity pattern into a series of circular harmonics. This paper investigates the applicability of this concept applied on a loudspeaker array on a cylindrical baffle, with a desired directivity pattern, which is specified in the frequency interval of 500-4000 Hz. From the specified frequency independent directivity pattern filter transfer functions for each speaker are determined. The sensitivity of various parameters, related to practical implementation, is also investigated by introducing filter errors for each array element. Measurements on a small scale model using six 2” drivers are compared with simulations, showing good agreement between experimental and predicted results.
ER  -