Finite Element Simulation of Ring Radiators with Acoustic Filter

Tipparaju L, Devantier A, Bezzola A. Finite Element Simulation of Ring Radiators with Acoustic Filter. In: AES Convention 141. Audio Engineering Society; 2016. Paper 9655. Available from: https://aes.org/publications/elibrary-page/?id=18459

@inproceedings{Tipparaju2016_18459,
  author = {Tipparaju, Lakshmikanth and Devantier, Allan and Bezzola, Andri},
  title = {{Finite Element Simulation of Ring Radiators with Acoustic Filter}},
  booktitle = {AES Convention 141},
  note = {Paper 9655},
  year = {2016},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18459}
}

TY  - CPAPER
TI  - Finite Element Simulation of Ring Radiators with Acoustic Filter
AU  - Tipparaju, Lakshmikanth
AU  - Devantier, Allan
AU  - Bezzola, Andri
T2  - AES Convention 141
M1  - Paper 9655
PY  - 2016
DA  - 2016/09/06
UR  - https://aes.org/publications/elibrary-page/?id=18459
PB  - Audio Engineering Society
LA  - en
AB  - Ring radiator loudspeakers consist of a phase plug in front of the diaphragm and are typically used to create omnidirectional sound. Potential resonances between the diaphragm and the phase plug create a design challenge and put additional requirements on the equalizer to obtain a flat amplitude response. We present a finite element model to predict and mitigate the undesirable peaks and dips in the amplitude response of ring radiator loudspeakers. Simulations show that a properly designed acoustic filter can minimize resonant behavior between diaphragm and phase plug. A maximum peak attenuation of 12 dB was obtained using this method. We observe good correlation between simulations and experimental results.
ER  -