Study and Characterization of the Odd and Even Nonlinearities in Electrodynamic Loudspeakers by Periodic Random-Phase Multisines

Gil-Cacho P, Van Waterschoot T, Moonen M, Jensen SH. Study and Characterization of the Odd and Even Nonlinearities in Electrodynamic Loudspeakers by Periodic Random-Phase Multisines. In: AES Convention 127. Audio Engineering Society; 2009. Paper 7841. Available from: https://aes.org/publications/elibrary-page/?id=15036

@inproceedings{GilCacho2009_15036,
  author = {Gil-Cacho, Pepe and Van Waterschoot, Toon and Moonen, Marc and Jensen, Søren Holdt},
  title = {{Study and Characterization of the Odd and Even Nonlinearities in Electrodynamic Loudspeakers by Periodic Random-Phase Multisines}},
  booktitle = {AES Convention 127},
  note = {Paper 7841},
  year = {2009},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15036}
}

TY  - CPAPER
TI  - Study and Characterization of the Odd and Even Nonlinearities in Electrodynamic Loudspeakers by Periodic Random-Phase Multisines
AU  - Gil-Cacho, Pepe
AU  - Van Waterschoot, Toon
AU  - Moonen, Marc
AU  - Jensen, Søren Holdt
T2  - AES Convention 127
M1  - Paper 7841
PY  - 2009
DA  - 2009/10/06
UR  - https://aes.org/publications/elibrary-page/?id=15036
PB  - Audio Engineering Society
LA  - en
AB  - In acoustic echo cancellation (AEC) applications, often times an acoustic path from a loudspeaker to a microphone is estimated by means of a linear adaptive filter. However, loudspeakers introduce nonlinear distortions which may strongly degrade the adaptive filter performance, thus nonlinear filters have to be considered. In this paper, measurements of three types of loudspeakers are conducted to detect, quantify and qualify nonlinearities by means of periodic random-phase multisines. It is shown that odd nonlinearities are more predominant than even nonlinearities over the entire frequency range. The aim of this paper is then to demonstrate that third-order (cubic) adaptive filters have to be used, which is in clear conflict with the extensive, almost unique, use of second-order (quadratic) Volterra filters.
ER  -