Comparison of Measurement Methods for the Equalization of Loudspeaker Panels Based on Bending Wave Radiation

Hörchens L, de Vries D. Comparison of Measurement Methods for the Equalization of Loudspeaker Panels Based on Bending Wave Radiation. In: AES Convention 130. Audio Engineering Society; 2011. Paper 8325. Available from: https://aes.org/publications/elibrary-page/?id=15792

@inproceedings{Horchens2011_15792,
  author = {Hörchens, Lars and de Vries, Diemer},
  title = {{Comparison of Measurement Methods for the Equalization of Loudspeaker Panels Based on Bending Wave Radiation}},
  booktitle = {AES Convention 130},
  note = {Paper 8325},
  year = {2011},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15792}
}

TY  - CPAPER
TI  - Comparison of Measurement Methods for the Equalization of Loudspeaker Panels Based on Bending Wave Radiation
AU  - Hörchens, Lars
AU  - de Vries, Diemer
T2  - AES Convention 130
M1  - Paper 8325
PY  - 2011
DA  - 2011/05/06
UR  - https://aes.org/publications/elibrary-page/?id=15792
PB  - Audio Engineering Society
LA  - en
AB  - Spatially extended panel loudspeakers based on bending wave radiation, such as distributed mode loudspeakers or multi-actuator panels, exhibit a complex radiation pattern with frequency-dependent directivity characteristics. This paper seeks to determine the kind, position and number of measurements needed to obtain an average radiation spectrum enabling efficient equalization. To this end, three approaches are compared: wave field extrapolation of the panel surface normal velocity, extrapolation of a near-field pressure measurement, and actual in-situ measurements at a number of random positions inside the listening space. The choice of the positions and the required number of measurements are discussed. Measurements taken on a multi-actuator panel are used to compare the different approaches and present numerical results.
ER  -