Accelerometer Based Motional Feedback Integrated in a 2 3/4" Loudspeaker

Bjerregaard R, Madsen AN, Schneider H, Agerkvist FT, Andersen MAE. Accelerometer Based Motional Feedback Integrated in a 2 3/4" Loudspeaker. In: AES Convention 140. Audio Engineering Society; 2016. Paper 9534. Available from: https://aes.org/publications/elibrary-page/?id=18233

@inproceedings{Bjerregaard2016_18233,
  author = {Bjerregaard, Ruben and Madsen, Anders N. and Schneider, Henrik and Agerkvist, Finn T. and Andersen, Michael A. E.},
  title = {{Accelerometer Based Motional Feedback Integrated in a 2 3/4" Loudspeaker}},
  booktitle = {AES Convention 140},
  note = {Paper 9534},
  year = {2016},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=18233}
}

TY  - CPAPER
TI  - Accelerometer Based Motional Feedback Integrated in a 2 3/4" Loudspeaker
AU  - Bjerregaard, Ruben
AU  - Madsen, Anders N.
AU  - Schneider, Henrik
AU  - Agerkvist, Finn T.
AU  - Andersen, Michael A. E.
T2  - AES Convention 140
M1  - Paper 9534
PY  - 2016
DA  - 2016/05/06
UR  - https://aes.org/publications/elibrary-page/?id=18233
PB  - Audio Engineering Society
LA  - en
AB  - It is a well known fact that loudspeakers produce distortion when they are driven into large diaphragm displacements. Various methods exist to reduce distortion using forward compensation and feedback methods. Acceleration based motional feedback is one of these methods and was already thoroughly described in the 1960s showing good results at low frequencies. In spite of this, the technique has mainly been used for closed box subwoofers to a limited extent. In this paper design and experimental results for a 23 /4 " acceleration based motional feedback loudspeaker are shown to extend this feedback method to a small full range loudspeaker. Furthermore, the audio quality from the system with feedback is discussed based on measurements of harmonic distortion, intermodulation distortion, and subjective evaluation.
ER  -