Modelling and Measurement of Nonlinear Intermodal Coupling in Loudspeaker Diaphragm Vibrations

Cardenas W. Modelling and Measurement of Nonlinear Intermodal Coupling in Loudspeaker Diaphragm Vibrations. In: AES Convention 147. Audio Engineering Society; 2019. Paper 10244. Available from: https://aes.org/publications/elibrary-page/?id=20617

@inproceedings{Cardenas2019_20617,
  author = {Cardenas, William},
  title = {{Modelling and Measurement of Nonlinear Intermodal Coupling in Loudspeaker Diaphragm Vibrations}},
  booktitle = {AES Convention 147},
  note = {Paper 10244},
  year = {2019},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=20617}
}

TY  - CPAPER
TI  - Modelling and Measurement of Nonlinear Intermodal Coupling in Loudspeaker Diaphragm Vibrations
AU  - Cardenas, William
T2  - AES Convention 147
M1  - Paper 10244
PY  - 2019
DA  - 2019/10/06
UR  - https://aes.org/publications/elibrary-page/?id=20617
PB  - Audio Engineering Society
LA  - en
AB  - Accurate prediction of the nonlinear transfer response of loudspeakers in the full band is relevant to optimize the development of audio products. Small size, light, and efficient transducers require low density and thin diaphragms, which may vibrate nonlinearly even at low amplitudes impairing the sound quality. This paper proposes an extension of the existing transducer model comprising breakup modes with geometrical nonlinearities, adding the nonlinear coupling effect between the piston mode and the breakup modes responsible for large intermodulation problems. A novel measurement technique to estimate the breakup frequency modulation induced by the piston mode excursion is presented, the model is validated with measurements of harmonic and intermodulation distortion and other symptoms relevant for assessment of acoustic performance.
ER  -