Modelling and Verification of Low-Frequency Sound Systems in the Application of Noise Predictions

Goldmann T, Feistel S, Blaul J, Nicht R. Modelling and Verification of Low-Frequency Sound Systems in the Application of Noise Predictions. In: Express Paper. Audio Engineering Society; 2025.pp. 373:1-12. Available from: https://aes.org/publications/elibrary-page/?id=23047

@inproceedings{Goldmann2025_23047,
  author = {Goldmann, Tobias and Feistel, Stefan and Blaul, Janosch and Nicht, reas},
  title = {{Modelling and Verification of Low-Frequency Sound Systems in the Application of Noise Predictions}},
  pages = {373:1-12},
  url = {https://aes.org/publications/elibrary-page/?id=23047},
  year = {2025},
  month = oct,
  publisher = {Audio Engineering Society}
}

TY  - CPAPER
TI  - Modelling and Verification of Low-Frequency Sound Systems in the Application of Noise Predictions
AU  - Goldmann, Tobias
AU  - Feistel, Stefan
AU  - Blaul, Janosch
AU  - Nicht, reas
SP  - 1
EP  - 12
M1  - Paper 373
PY  - 2025
DA  - 2025/10/14
UR  - https://aes.org/publications/elibrary-page/?id=23047
PB  - Audio Engineering Society
LA  - en
AB  - Noise emission into the neighbourhood is often an essential aspect when designing an open-air sound system. The low-frequency range is particularly important, as a high sound pressure level of music signals and low absorption by the environment are to be expected. The overall radiation characteristic depends on the superposition of the individual sources. Due to the long wavelength in the operating range, the radiation pattern can be controlled only with considerable technical and financial effort. It is therefore of great interest to simulate the stage configuration accurately and derive a sound source description for the noise prediction model, which can represent the complex radiation behaviour of the entire sound reinforcement system according to current standards and regulations. In this study, the Aggregate Point Source model is used to calculate and validate a substitute sound source for practically relevant subwoofer configurations of varying complexity. Starting with the theoretical background of the distance behaviour of loudspeaker arrays, the sound field and radiation of the example setups in the measurements are first compared with a complex point source model typically used in the design process of sound reinforcement systems. In a second step, the resulting substitute sound sources are implemented in noise prediction software to validate the far-field radiation in the low-frequency range based on a single directivity dataset. The results are practically accurate in both simulation environments under the given far-field conditions and limits of uncertainty.
ER  -