A Compact 120 Independent Element Spherical Loudspeaker Array with Programable Radiation Patterns

Avizienis R, Freed A, Kassakian P, Wessel D. A Compact 120 Independent Element Spherical Loudspeaker Array with Programable Radiation Patterns. In: AES Convention 120. Audio Engineering Society; 2006. Paper 6783. Available from: https://aes.org/publications/elibrary-page/?id=13587

@inproceedings{Avizienis2006_13587,
  author = {Avizienis, Rimas and Freed, Adrian and Kassakian, Peter and Wessel, David},
  title = {{A Compact 120 Independent Element Spherical Loudspeaker Array with Programable Radiation Patterns}},
  booktitle = {AES Convention 120},
  note = {Paper 6783},
  year = {2006},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13587}
}

TY  - CPAPER
TI  - A Compact 120 Independent Element Spherical Loudspeaker Array with Programable Radiation Patterns
AU  - Avizienis, Rimas
AU  - Freed, Adrian
AU  - Kassakian, Peter
AU  - Wessel, David
T2  - AES Convention 120
M1  - Paper 6783
PY  - 2006
DA  - 2006/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13587
PB  - Audio Engineering Society
LA  - en
AB  - We describe the geometric and engineering design challenges that were overcome to create a new compact, 10-inch diameter spherical loudspeaker array with integrated class-D amplifiers and a 120 independent channel digital audio interface using Gigabit Ethernet. A special hybrid geometry is used that combines the maximal symmetry of a triangular-faceted icosahedron with the compact planar packing of 6 circles on an equilateral triangle ("billiard ball packing"). Six custom 1.25inch drivers developed by Meyer Sound Labs are mounted on each of 20 aluminum triangular circuit boards. Class D amplifiers for the six speakers are mounted on the other side of each board. Two pentagonal circuit boards in the icosahedron employ Xilinx Spartan 3E FPGA's to demultiplex digital audio signals from incoming Gigabit Ethernet packets and process them before feeding the class-D modulators. Processing includes scaling, delaying, filtering and limiting.
ER  -