Coherent Superposition of Acoustic Sources as a Function of Environmental Parameters

Feistel R, Feistel S. Coherent Superposition of Acoustic Sources as a Function of Environmental Parameters. In: AES Convention 129. Audio Engineering Society; 2010. Paper 8158. Available from: https://aes.org/publications/elibrary-page/?id=15581

@inproceedings{Feistel2010_15581,
  author = {Feistel, Rainer and Feistel, Stefan},
  title = {{Coherent Superposition of Acoustic Sources as a Function of Environmental Parameters}},
  booktitle = {AES Convention 129},
  note = {Paper 8158},
  year = {2010},
  month = nov,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15581}
}

TY  - CPAPER
TI  - Coherent Superposition of Acoustic Sources as a Function of Environmental Parameters
AU  - Feistel, Rainer
AU  - Feistel, Stefan
T2  - AES Convention 129
M1  - Paper 8158
PY  - 2010
DA  - 2010/11/06
UR  - https://aes.org/publications/elibrary-page/?id=15581
PB  - Audio Engineering Society
LA  - en
AB  - Sound reinforcement systems and loudspeaker arrays consist of numerous, spatially distributed sources. The signal alignment of these components is crucial to provide even level coverage and consistent spectral distribution throughout the audience areas. One usually assumes that sources located close to each other sum coherently in contrast to sources spaced far apart which sum energetically at the receiver. However, in reality this assumption seldom holds since environmental conditions, such as fluctuations of temperature and air flow and their spatial correlation, determine the actual level of coherence. We derive a theoretical framework for practical estimates of this important effect based on stochastic theory. We quantify the resulting measure of coherence as a function of the different environmental parameters in the form of a gradually modified complex amplitude superposition. Results are verified using numerical models and measurement.
ER  -