Modeling the Intermodulation Distortion of a Coaxial Loudspeaker

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E. Dupont, and S. Lipshitz, "Modeling the Intermodulation Distortion of a Coaxial Loudspeaker," Paper 7840, (2009 October.). doi:
E. Dupont, and S. Lipshitz, "Modeling the Intermodulation Distortion of a Coaxial Loudspeaker," Paper 7840, (2009 October.). doi:
Abstract: This paper is an attempt to explain the intermodulation distortion of a coaxial loudspeaker driver. Such a loudspeaker, in which the woofer and tweeter are excited at frequencies f1 and f2 respectively, is known to produce sum and difference frequencies f± = f1 ± f2. Generation of these can be attributed to both the nonlinearity of the equations of motion and the Lagrangian boundary behavior of the woofer. A simplified model is used consisting of an acoustic monopole located in front of a baffled planar piston. To characterize the phenomena of interest the second-order equation for pressure is used. An exact integral solution is then given for the f± pressure terms. A special case analytic solution is also discussed. Several numerical investigations of the model are performed and compared with experiment.

@article{dupont2009modeling,
author={dupont, edward and lipshitz, stanley},
journal={journal of the audio engineering society},
title={modeling the intermodulation distortion of a coaxial loudspeaker},
year={2009},
volume={},
number={},
pages={},
doi={},
month={october},}
@article{dupont2009modeling,
author={dupont, edward and lipshitz, stanley},
journal={journal of the audio engineering society},
title={modeling the intermodulation distortion of a coaxial loudspeaker},
year={2009},
volume={},
number={},
pages={},
doi={},
month={october},
abstract={this paper is an attempt to explain the intermodulation distortion of a coaxial loudspeaker driver. such a loudspeaker, in which the woofer and tweeter are excited at frequencies f1 and f2 respectively, is known to produce sum and difference frequencies f± = f1 ± f2. generation of these can be attributed to both the nonlinearity of the equations of motion and the lagrangian boundary behavior of the woofer. a simplified model is used consisting of an acoustic monopole located in front of a baffled planar piston. to characterize the phenomena of interest the second-order equation for pressure is used. an exact integral solution is then given for the f± pressure terms. a special case analytic solution is also discussed. several numerical investigations of the model are performed and compared with experiment.},}

TY - paper
TI - Modeling the Intermodulation Distortion of a Coaxial Loudspeaker
SP -
EP -
AU - Dupont, Edward
AU - Lipshitz, Stanley
PY - 2009
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2009
TY - paper
TI - Modeling the Intermodulation Distortion of a Coaxial Loudspeaker
SP -
EP -
AU - Dupont, Edward
AU - Lipshitz, Stanley
PY - 2009
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - October 2009
AB - This paper is an attempt to explain the intermodulation distortion of a coaxial loudspeaker driver. Such a loudspeaker, in which the woofer and tweeter are excited at frequencies f1 and f2 respectively, is known to produce sum and difference frequencies f± = f1 ± f2. Generation of these can be attributed to both the nonlinearity of the equations of motion and the Lagrangian boundary behavior of the woofer. A simplified model is used consisting of an acoustic monopole located in front of a baffled planar piston. To characterize the phenomena of interest the second-order equation for pressure is used. An exact integral solution is then given for the f± pressure terms. A special case analytic solution is also discussed. Several numerical investigations of the model are performed and compared with experiment.

This paper is an attempt to explain the intermodulation distortion of a coaxial loudspeaker driver. Such a loudspeaker, in which the woofer and tweeter are excited at frequencies f1 and f2 respectively, is known to produce sum and difference frequencies f± = f1 ± f2. Generation of these can be attributed to both the nonlinearity of the equations of motion and the Lagrangian boundary behavior of the woofer. A simplified model is used consisting of an acoustic monopole located in front of a baffled planar piston. To characterize the phenomena of interest the second-order equation for pressure is used. An exact integral solution is then given for the f± pressure terms. A special case analytic solution is also discussed. Several numerical investigations of the model are performed and compared with experiment.

Authors:
Dupont, Edward; Lipshitz, Stanley
Affiliation:
University of Waterloo, Waterloo, Ontario, Canada
AES Convention:
127 (October 2009)
Paper Number:
7840
Publication Date:
October 1, 2009Import into BibTeX
Subject:
Transducer Modeling and Design
Permalink:
http://www.aes.org/e-lib/browse.cfm?elib=15035