Defining the Un-Aliased Region for Focused Sources

Oldfield R, Drumm I. Defining the Un-Aliased Region for Focused Sources. In: AES Convention 135. Audio Engineering Society; 2013. Paper 9001. Available from: https://aes.org/publications/elibrary-page/?id=17049

@inproceedings{Oldfield2013_17049,
  author = {Oldfield, Robert and Drumm, Ian},
  title = {{Defining the Un-Aliased Region for Focused Sources}},
  booktitle = {AES Convention 135},
  note = {Paper 9001},
  year = {2013},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17049}
}

TY  - CPAPER
TI  - Defining the Un-Aliased Region for Focused Sources
AU  - Oldfield, Robert
AU  - Drumm, Ian
T2  - AES Convention 135
M1  - Paper 9001
PY  - 2013
DA  - 2013/10/06
UR  - https://aes.org/publications/elibrary-page/?id=17049
PB  - Audio Engineering Society
LA  - en
AB  - Sound field synthesis reproduction techniques such as wave field synthesis can accurately reproduce wave fronts of arbitrary curvature, including sources with the wave fronts of a source in front of the array. The wave fronts are accurate up until the spatial aliasing frequency, above which there are no longer enough secondary sources (loudspeakers) to reproduce the wave front accurately, resulting in spatial aliasing contribution manifesting as additional wave fronts propagating in directions other than intended. These contributions cause temporal, spectral, and spatial errors in the reproduced wave front. Focused sources (sources in front of the loudspeaker array) have a unique attribute in this sense in that there is a clearly defined region around the virtual source position that exhibits no spatial aliasing contributions even at an extremely high frequency. This paper presents a method for the full characterization of this un-aliased region using both a ray-based propagation model and a time domain approach.
ER  -