Improvements in Elimination of Loudspeaker Distortion in Acoustic Measurements

Agerkvist FT, Torras-Rosell A, McWalter R. Improvements in Elimination of Loudspeaker Distortion in Acoustic Measurements. In: AES Convention 138. Audio Engineering Society; 2015. Paper 9316. Available from: https://aes.org/publications/elibrary-page/?id=17740

@inproceedings{Agerkvist2015_17740,
  author = {Agerkvist, Finn T. and Torras-Rosell, Antoni and McWalter, Richard},
  title = {{Improvements in Elimination of Loudspeaker Distortion in Acoustic Measurements}},
  booktitle = {AES Convention 138},
  note = {Paper 9316},
  year = {2015},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=17740}
}

TY  - CPAPER
TI  - Improvements in Elimination of Loudspeaker Distortion in Acoustic Measurements
AU  - Agerkvist, Finn T.
AU  - Torras-Rosell, Antoni
AU  - McWalter, Richard
T2  - AES Convention 138
M1  - Paper 9316
PY  - 2015
DA  - 2015/05/06
UR  - https://aes.org/publications/elibrary-page/?id=17740
PB  - Audio Engineering Society
LA  - en
AB  - This paper investigates the influence of nonlinear components that contaminate the linear response of acoustic transducers and presents improved methods for eliminating the influence of nonlinearities in acoustic measurements. The method is evaluated with pure sinusoidal signals as well as swept sine signals and is tested on models of memoryless nonlinear systems as well as nonlinear loudspeakers. The method is shown to give a clear benefit over existing methods. Two techniques that improve the signal to noise ratio are demonstrated: the first uses more measurement level than the number of orders to be separated, whereas the other one is based on standard Tikhonov regularization. Both methods are shown to significantly improve the signal to noise ratio.
ER  -