Pressure-Matching Beamforming Method for Loudspeaker Arrays with Frequency Dependent Selection of Control Points

Olivieri F, Fazi FM, Shin M, Nelson P. Pressure-Matching Beamforming Method for Loudspeaker Arrays with Frequency Dependent Selection of Control Points. In: AES Convention 138. Audio Engineering Society; 2015. Paper 9322. Available from: https://aes.org/publications/elibrary-page/?id=17746

@inproceedings{Olivieri2015_17746,
  author = {Olivieri, Ferdinando and Fazi, Filippo Maria and Shin, Mincheol and Nelson, Philip},
  title = {{Pressure-Matching Beamforming Method for Loudspeaker Arrays with Frequency Dependent Selection of Control Points}},
  booktitle = {AES Convention 138},
  note = {Paper 9322},
  year = {2015},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17746}
}

TY  - CPAPER
TI  - Pressure-Matching Beamforming Method for Loudspeaker Arrays with Frequency Dependent Selection of Control Points
AU  - Olivieri, Ferdinando
AU  - Fazi, Filippo Maria
AU  - Shin, Mincheol
AU  - Nelson, Philip
T2  - AES Convention 138
M1  - Paper 9322
PY  - 2015
DA  - 2015/05/06
UR  - https://aes.org/publications/elibrary-page/?id=17746
PB  - Audio Engineering Society
LA  - en
AB  - The Pressure-Matching Method (PMM) is a signal processing technique used to generate the digital filters required by a loudspeaker array to reproduce a desired sound field. System performance depends on the choice of a number of parameters of the numerical algorithm, such as the target field and the regularization factor. If a target sound field is chosen with large amplitude variation between the so-called control points, performance might also depend on the relative distance between these points in relation to a the wavelength of the sound to be reproduced. If this distance is too small, the accuracy of the reproduced field may be reduced at the listener location. A strategy is proposed to improve the PMM that is based on a frequency-dependent selection of the control points that contribute to the PMM cost function. By means of numerical simulations and experiments in anechoic environment, it is shown that the proposed method allows for accurate control of the response of the reproduced field at the listener location.
ER  -