A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction

Based on the Berktay's farfield solution, various preprocessing methods were proposed to reduce the distortion of the highly directional audible signal in the parametric loudspeaker. However, the Berktay's farfield solution is an approximated model of nonlinear acoustic propagation. To det...

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Main Authors: Gan, Woon-Seng, Yang, Jun., Ji, Peifeng., Tan, Ee-Leng.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2011
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Online Access:https://hdl.handle.net/10356/93869
http://hdl.handle.net/10220/7085
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-938692020-03-07T13:57:31Z A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction Gan, Woon-Seng Yang, Jun. Ji, Peifeng. Tan, Ee-Leng. School of Electrical and Electronic Engineering National Research Foundation Singapore DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing Based on the Berktay's farfield solution, various preprocessing methods were proposed to reduce the distortion of the highly directional audible signal in the parametric loudspeaker. However, the Berktay's farfield solution is an approximated model of nonlinear acoustic propagation. To determine the effectiveness of these methods, we analyze various preprocessing methods theoretically for directional speech reproduction using the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation, which provides a more accurate model of nonlinear acoustic propagation. In order to reduce the distortion effectively in the parametric loudspeaker with these preprocessing methods, the initial sound pressure level of the carrier frequency is found to be less than 132 dB according to the KZK equation. Unlike the Berktay' farfield solution that results in a +12 dB/octave gain slope, different gain slopes are derived using the KZK equation and appropriate equalizers are proposed to improve the frequency response of the parametric loudspeaker. The optimal preprocessing method for directional speech reproduction is established based on the KZK equation, which has a relatively flat frequency response of the desired speech signal and the best total harmonic distortion performance. Accepted version 2011-09-21T03:01:10Z 2019-12-06T18:46:53Z 2011-09-21T03:01:10Z 2019-12-06T18:46:53Z 2010 2010 Journal Article Ji, P., Tan, E. L., Gan, W. S., & Yang, J. (2010). A Comparative Analysis of Preprocessing Methods for the Parametric Loudspeaker Based on the Khokhlov-Zabolotskaya-Kuznetsov Equation for Speech Reproduction. IEEE Transactions on Audio, Speech, and Language Processing, 19(4), 937-946. 1558-7916 https://hdl.handle.net/10356/93869 http://hdl.handle.net/10220/7085 10.1109/TASL.2010.2070794 156504 en IEEE transactions on audio speech and language processing © 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [DOI: http://dx.doi.org/10.1109/TASL.2010.2070794]. 28 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing
Gan, Woon-Seng
Yang, Jun.
Ji, Peifeng.
Tan, Ee-Leng.
A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction
description Based on the Berktay's farfield solution, various preprocessing methods were proposed to reduce the distortion of the highly directional audible signal in the parametric loudspeaker. However, the Berktay's farfield solution is an approximated model of nonlinear acoustic propagation. To determine the effectiveness of these methods, we analyze various preprocessing methods theoretically for directional speech reproduction using the Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation, which provides a more accurate model of nonlinear acoustic propagation. In order to reduce the distortion effectively in the parametric loudspeaker with these preprocessing methods, the initial sound pressure level of the carrier frequency is found to be less than 132 dB according to the KZK equation. Unlike the Berktay' farfield solution that results in a +12 dB/octave gain slope, different gain slopes are derived using the KZK equation and appropriate equalizers are proposed to improve the frequency response of the parametric loudspeaker. The optimal preprocessing method for directional speech reproduction is established based on the KZK equation, which has a relatively flat frequency response of the desired speech signal and the best total harmonic distortion performance.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Gan, Woon-Seng
Yang, Jun.
Ji, Peifeng.
Tan, Ee-Leng.
format Article
author Gan, Woon-Seng
Yang, Jun.
Ji, Peifeng.
Tan, Ee-Leng.
author_sort Gan, Woon-Seng
title A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction
title_short A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction
title_full A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction
title_fullStr A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction
title_full_unstemmed A comparative analysis of preprocessing methods for the parametric loudspeaker based on the Khokhlov-Zabolotskaya-Kuznetsov equation for speech reproduction
title_sort comparative analysis of preprocessing methods for the parametric loudspeaker based on the khokhlov-zabolotskaya-kuznetsov equation for speech reproduction
publishDate 2011
url https://hdl.handle.net/10356/93869
http://hdl.handle.net/10220/7085
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