Simulation of a 4" Compression Driver Using a Fully Coupled Vibroacoustic Finite Element Analysis including Viscous and Thermal Losses

Christensen R, Skov U. Simulation of a 4" Compression Driver Using a Fully Coupled Vibroacoustic Finite Element Analysis including Viscous and Thermal Losses. In: AES Convention 132. Audio Engineering Society; 2012. Paper 8672. Available from: https://aes.org/publications/elibrary-page/?id=16310

@inproceedings{Christensen2012_16310,
  author = {Christensen, René and Skov, Ulrik},
  title = {{Simulation of a 4" Compression Driver Using a Fully Coupled Vibroacoustic Finite Element Analysis including Viscous and Thermal Losses}},
  booktitle = {AES Convention 132},
  note = {Paper 8672},
  year = {2012},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16310}
}

TY  - CPAPER
TI  - Simulation of a 4" Compression Driver Using a Fully Coupled Vibroacoustic Finite Element Analysis including Viscous and Thermal Losses
AU  - Christensen, René
AU  - Skov, Ulrik
T2  - AES Convention 132
M1  - Paper 8672
PY  - 2012
DA  - 2012/04/06
UR  - https://aes.org/publications/elibrary-page/?id=16310
PB  - Audio Engineering Society
LA  - en
AB  - A 4" JBL compression driver is simulated using a finite element analysis, FEA. Compared to a conventional electrodynamic driver a compression driver has a phase plug with slits in front of the diaphragm. The slits are acoustically narrow and the diaphragm is separated from the phase plug only by a thin gap so an accurate model must include viscothermal effects to account for the losses associated with the narrow air gaps. Air domains, structural domains and viscothermal domains are all fully coupled to ensure the proper continuity of their variables. Simulated results are compared to experimental measurements and it is demonstrated how the viscothermal effects dampen out acoustic and structural modes.
ER  -