Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency

Candy J. Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency. J Audio Eng Soc. 2013;61(6):356-365. Available from: https://aes.org/publications/elibrary-page/?id=16828

@article{Candy2013_16828,
  author = {Candy, Jeff},
  title = {{Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency}},
  journal = {Journal of the Audio Engineering Society},
  volume = {61},
  number = {6},
  pages = {356--365},
  year = {2013},
  month = jun,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16828}
}

TY  - JOUR
TI  - Accurate Calculation of Radiation and Diffraction from Loudspeaker Enclosures at Low Frequency
AU  - Candy, Jeff
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 61
IS  - 6
SP  - 356
EP  - 365
PY  - 2013
DA  - 2013/06/06
UR  - https://aes.org/publications/elibrary-page/?id=16828
PB  - Audio Engineering Society
LA  - en
AB  - A model that accurately computes the sound pressure field of a loudspeaker would be an efficient tool for designing a real transducer system. Although there are many tools for calculating radiation and diffraction from loudspeaker cabinets, the results are only valid for high frequencies; traditional approaches for modeling diffraction produce significant errors at frequencies below 500 Hz. This research describes an approach to solve the 3-dimensional Helmholtz equations of a piston radiator in a rectangular solid enclosure using the Method of Fundamental Solutions. This method enables accurate calculation of sound pressure, including an exact representation of diffraction. The radiation impedance of a piston in a finite enclosure can also be computed. In practice, there is a maximum frequency that depends on the cabinet size. The low- and high-frequency models can then be smoothly joined.
ER  -