On Spatial-Aliasing-Free Sound Field Reproduction using Infinite Line Source Arrays

Schultz F, Rettberg T, Spors S. On Spatial-Aliasing-Free Sound Field Reproduction using Infinite Line Source Arrays. In: AES Convention 136. Audio Engineering Society; 2014. Paper 9078. Available from: https://aes.org/publications/elibrary-page/?id=17225

@inproceedings{Schultz2014_17225,
  author = {Schultz, Frank and Rettberg, Till and Spors, Sascha},
  title = {{On Spatial-Aliasing-Free Sound Field Reproduction using Infinite Line Source Arrays}},
  booktitle = {AES Convention 136},
  note = {Paper 9078},
  year = {2014},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17225}
}

TY  - CPAPER
TI  - On Spatial-Aliasing-Free Sound Field Reproduction using Infinite Line Source Arrays
AU  - Schultz, Frank
AU  - Rettberg, Till
AU  - Spors, Sascha
T2  - AES Convention 136
M1  - Paper 9078
PY  - 2014
DA  - 2014/04/06
UR  - https://aes.org/publications/elibrary-page/?id=17225
PB  - Audio Engineering Society
LA  - en
AB  - Concert sound reinforcement systems aim at the reproduction of homogeneous sound fields over extended audiences for the whole audio bandwidth. For the last two decades this has been mostly approached by using so called line source arrays due to their superior abilities of producing homogeneous sound fields. Design and setup criteria for line source arrays were derived as Wavefront Sculpture Technology in literature. This paper introduces a viewpoint on the problem at hand by utilizing a signal processing model for sound field synthesis. It will be shown that the optimal radiation of a line source array can be considered as a special case of spatial-aliasing-free synthesis of a wave front that propagates perpendicular to the array. For high frequencies the so called waveguide operates as a spatial low-pass filter and therefore attenuates energy that otherwise would lead to spatial aliasing artifacts.
ER  -