Near and Far-field Control of Focused Sound Radiation Using a Loudspeaker Array

Choi JW, Kim Y, Ko S. Near and Far-field Control of Focused Sound Radiation Using a Loudspeaker Array. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8198. Available from: https://aes.org/publications/elibrary-page/?id=15620

@inproceedings{Choi2010_15620,
  author = {Choi, Jung-Woo and Kim, Youngtae and Ko, Sangchul},
  title = {{Near and Far-field Control of Focused Sound Radiation Using a Loudspeaker Array}},
  booktitle = {AES Convention 129},
  note = {Paper 8198},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15620}
}

TY  - CPAPER
TI  - Near and Far-field Control of Focused Sound Radiation Using a Loudspeaker Array
AU  - Choi, Jung-Woo
AU  - Kim, Youngtae
AU  - Ko, Sangchul
T2  - AES Convention 129
M1  - Paper 8198
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15620
PB  - Audio Engineering Society
LA  - en
AB  - In this paper, a sound manipulation technique is proposed to prevent unwanted eavesdropping or disturbing others in the vicinity if a multimedia device is being used in a public place. This is capable of realizing to create a spatial region having highly acoustic potential energy at the listener’s position. For doing so, the paper discusses the design of multi-channel filters with a given the spatial directivity pattern for a given arbitrary loudspeaker array configuration. Firstly some limitations in using conventional beamforming technique are presented, and then a novel control strategy is suggested for reproducing a desired acoustic property in a spatial area of interest close to the loudspeaker array. This technique also allows us to control an acoustic property in area relatively far from the array with a single objective function. In order to precisely produce a desired shape of energy distribution in both areas, spatial weighting technique is introduced. The results are compared with those from controlling each area separately.
ER  -