Non-linear acoustic losses prediction in vented loudspeaker using computational fluid dynamic simulation

Pene Y, Horyn Y, Combet C. Non-linear acoustic losses prediction in vented loudspeaker using computational fluid dynamic simulation. In: AES Convention 148. Audio Engineering Society; 2020. Paper 10359. Available from: https://aes.org/publications/elibrary-page/?id=20776

@inproceedings{Pene2020_20776,
  author = {Pene, Yves and Horyn, Yoachim and Combet, Christophe},
  title = {{Non-linear acoustic losses prediction in vented loudspeaker using computational fluid dynamic simulation}},
  booktitle = {AES Convention 148},
  note = {Paper 10359},
  year = {2020},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20776}
}

TY  - CPAPER
TI  - Non-linear acoustic losses prediction in vented loudspeaker using computational fluid dynamic simulation
AU  - Pene, Yves
AU  - Horyn, Yoachim
AU  - Combet, Christophe
T2  - AES Convention 148
M1  - Paper 10359
PY  - 2020
DA  - 2020/05/06
UR  - https://aes.org/publications/elibrary-page/?id=20776
PB  - Audio Engineering Society
LA  - en
AB  - Bass-reflex designs can exhibit strong non-linear behaviour around their resonant frequency with significant acoustic losses and parasite noise emission. These phenomena are mainly due to turbulences and flow separation at the port’s inlet and outlet. This work proposes a method to predict the resulting non-linear acoustic losses for a given loudspeaker, enclosure volume and port geometry. The approach consists of coupling computational fluid dynamics (CFD) simulation with loudspeaker non-linear motion modelization. Four different ports geometries mounted on one given loudspeaker enclosure are tested. The computed acoustic losses are compared with measurements and show a good agreement. The obtained results prove that the proposed method can predict non-linear losses with an average error less than 1 dB around the Helmholtz frequency.
ER  -