Identification of the parametric array loudspeaker with a Volterra filter using the sparse NLMS algorithm

Shi, Chuang and Kajikawa, Yoshinobu (2015) Identification of the parametric array loudspeaker with a Volterra filter using the sparse NLMS algorithm. In 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE. 5 pp . (doi:10.1109/ICASSP.2015.7178596).

Record type: Conference or Workshop Item (Paper)

Abstract

Volterra filters can be applied to a wide range of nonlinear systems, keeping only the low order kernels to yield a good approximation. The parametric array loudspeaker (PAL), as a weak nonlinear acoustic system, is an attractive directional sound reproduction device. Volterra filters have been adopted in the linearization system of the PAL that efficiently reduces the nonlinear distortion with no need of solving the nonlinear acoustic equation. In this paper, the ultrasound-to-ultrasound Volterra filter is proposed, being inspired by the nonlinear acoustic principle, to provide a better systematic representation of the PAL. Experiment results are presented to prove the effectiveness of the proposed approach, where the sparse NLMS algorithm is carried out in the identification.

Text

ICASSP40_Submission - Accepted Manuscript

Available under License University of Southampton Accepted Manuscript Licence.

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