Nonlinearities in Loudspeaker Ports

Vanderkooy J. Nonlinearities in Loudspeaker Ports. In: AES Convention 104. Audio Engineering Society; 1998. Paper 4748. Available from: https://aes.org/publications/elibrary-page/?id=8432

@inproceedings{Vanderkooy1998_8432,
  author = {Vanderkooy, John},
  title = {{Nonlinearities in Loudspeaker Ports}},
  booktitle = {AES Convention 104},
  note = {Paper 4748},
  year = {1998},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=8432}
}

TY  - CPAPER
TI  - Nonlinearities in Loudspeaker Ports
AU  - Vanderkooy, John
T2  - AES Convention 104
M1  - Paper 4748
PY  - 1998
DA  - 1998/05/06
UR  - https://aes.org/publications/elibrary-page/?id=8432
PB  - Audio Engineering Society
LA  - en
AB  - The increasing demand for high SPL at low frequencies has prompted the study of nonlinearities in loudspeaker ports. At high levels, ports produce jets of air, display acoustic compression, loss and distortion, generate turbulence noise, and rectify pressure fluctuations. These phenomena are measured and analyzed. A simplified nonlinear model of a port is presented. Flared ends and gentle tapering help somewhat. The low-level linear acoustic characteristics of ports of varying cross-section are analyzed. The velocity profiles of ports are measured, and a new theory for this and the associated nearfield pressure is presented, which contradicts the usual "piston-in-a-baffle" approach.
ER  -