Personal Sound Zones: The Significance of Loudspeaker Driver Nonlinear Distortion

Ma X, Hegarty PJ, Pedersen JA, Johansen LG, Larsen JJ. Personal Sound Zones: The Significance of Loudspeaker Driver Nonlinear Distortion. In: AES Conference: 2016 AES International Conference on Sound Field Control. Audio Engineering Society; 2016. Paper P-3. Available from: https://aes.org/publications/elibrary-page/?id=18305

@inproceedings{Ma2016_18305,
  author = {Ma, Xiaohui and Hegarty, Patrick J. and Pedersen, Jan Abildgaard and Johansen, Lars G. and Larsen, Jakob Juul},
  title = {{Personal Sound Zones: The Significance of Loudspeaker Driver Nonlinear Distortion}},
  booktitle = {AES Conference: 2016 AES International Conference on Sound Field Control},
  note = {Paper P-3},
  year = {2016},
  month = jul,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18305}
}

TY  - CPAPER
TI  - Personal Sound Zones: The Significance of Loudspeaker Driver Nonlinear Distortion
AU  - Ma, Xiaohui
AU  - Hegarty, Patrick J.
AU  - Pedersen, Jan Abildgaard
AU  - Johansen, Lars G.
AU  - Larsen, Jakob Juul
T2  - AES Conference: 2016 AES International Conference on Sound Field Control
M1  - Paper P-3
PY  - 2016
DA  - 2016/07/06
UR  - https://aes.org/publications/elibrary-page/?id=18305
PB  - Audio Engineering Society
LA  - en
AB  - The influence of loudspeaker nonlinear distortion on personal sound zones is studied through simulations under anechoic conditions. Two sound zones, one bright, one dark are created by four linear loudspeaker arrays placed at the edges of a 2.5m x 2.5m square. Two methods for controlling the zones, acoustic contrast control and planarity control are employed. Loudspeaker nonlinear distortion is modeled with either second or third order nonlinearities. Without nonlinear distortion, simulations produce a contrast of 80.0 dB for both methods. When nonlinear distortion is added, the contrast is reduced mainly due to new, uncontrolled components in the dark zone. The impact of nonlinear distortion can be tuned through regularization governing the loudspeaker control effort and the contrast can be optimized.
ER  -