A Differential Approach for the Implementation of Superdirective Loudspeaker Array

Choi JW, Kim Y, Ko S, Kim J. A Differential Approach for the Implementation of Superdirective Loudspeaker Array. In: AES Convention 128. Audio Engineering Society; 2010. Paper 8032. Available from: https://aes.org/publications/elibrary-page/?id=15329

@inproceedings{Choi2010_15329,
  author = {Choi, Jung-Woo and Kim, Youngtae and Ko, Sangchul and Kim, Jungho},
  title = {{A Differential Approach for the Implementation of Superdirective Loudspeaker Array}},
  booktitle = {AES Convention 128},
  note = {Paper 8032},
  year = {2010},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15329}
}

TY  - CPAPER
TI  - A Differential Approach for the Implementation of Superdirective Loudspeaker Array
AU  - Choi, Jung-Woo
AU  - Kim, Youngtae
AU  - Ko, Sangchul
AU  - Kim, Jungho
T2  - AES Convention 128
M1  - Paper 8032
PY  - 2010
DA  - 2010/05/06
UR  - https://aes.org/publications/elibrary-page/?id=15329
PB  - Audio Engineering Society
LA  - en
AB  - A loudspeaker arrangement and corresponding analysis method to obtain robust superdirective beam are proposed. The superdirectivity technique requires precise matching of the sound sources modeled to calculate excitation pattern and those used for the loudspeaker array. To resolve the robustness issue arising from the modeling mismatch error, we show that the overall sensitivity to the model-mismatch error can be reduced by rearranging loudspeaker positions. Specifically, a beam pattern obtained by a conventional optimization technique is represented as a product of robust delay-and-sum and error-sensitive differential patterns. The excitation pattern driving loudspeaker array is then reformulated such that the error-sensitive pattern is only applied to the outermost loudspeaker elements, and the array design that fits to the new excitation pattern is discussed.
ER  -