Material models in loudspeakers using frictional elements

Sørensen R, Agerkvist F. Material models in loudspeakers using frictional elements. In: AES Convention 151. Audio Engineering Society; 2021. Paper 10530. Available from: https://aes.org/publications/elibrary-page/?id=21494

@inproceedings{Sorensen2021_21494,
  author = {Sørensen, Rasmus and Agerkvist, Finn},
  title = {{Material models in loudspeakers using frictional elements}},
  booktitle = {AES Convention 151},
  note = {Paper 10530},
  year = {2021},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=21494}
}

TY  - CPAPER
TI  - Material models in loudspeakers using frictional elements
AU  - Sørensen, Rasmus
AU  - Agerkvist, Finn
T2  - AES Convention 151
M1  - Paper 10530
PY  - 2021
DA  - 2021/10/06
UR  - https://aes.org/publications/elibrary-page/?id=21494
PB  - Audio Engineering Society
LA  - en
AB  - The compliance of a moving coil loudspeaker is known to depend on the level of the input signal. This nonlinear effect is visible as a drop in resonance frequency with increasing level. A nonlinear frictional element with hysteresis, and thus a level dependent compliance and damping, is added to the standard lumped parameter model. A comparison of simulation results and measurements reveals that the frictional model is able to explain the nonlinear behavior seen in the measurements. The paper presents a scheme for fitting the model parameters to measured data. Results suggest that strong interaction between the frictional elements and the linear parameters is complicating this fitting, and strategies for solving this problem is presented and discussed.
ER  -