Linearization of the parametric array loudspeaker upon varying input amplitudes

Hatano, Yuta, Shi, Chuang, Kinoshita, Satoshi and Kajikawa, Yoshinobu (2016) Linearization of the parametric array loudspeaker upon varying input amplitudes. In Proceedings of the 2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2015 ). IEEE. pp. 515-519 . (doi:10.1109/APSIPA.2015.7415324).

Record type: Conference or Workshop Item (Paper)

Abstract

In spite of being a compact directional sound device, the parametric array loudspeaker (PAL) has often been criticized for its severe nonlinear distortion. In some preliminary studies, the nonlinear distortion is able to be reduced by using the linearization system based on Volterra filter identification, which models the nonlinear sound process of the PAL. However, the nonlinearity of the PAL changes with the input amplitude. When the input amplitude is high enough, there is strong high-order nonlinearity and the 2nd-order Volterra kernel cannot be accurately identified. Therefore, an improved identification method of the 2nd-order Volterra kernel is proposed to exclude the interference from the 4th-order nonlinearity.

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Published date: 25 February 2016

Venue - Dates: 2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA), , Hong Kong, China, 2015-12-16 - 2016-12-19