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9999024
Loudspeaker Parameters Inverse Problem for Improving Sound Frequency Response Simulation
Abstract:
The sound pressure level (SPL) of the moving-coil loudspeaker (MCL) is often simulated and analyzed using the lumped parameter model. However, the SPL of a MCL cannot be simulated precisely in the high frequency region, because the value of cone effective area is changed due to the geometry variation in different mode shapes, it is also related to affect the acoustic radiation mass and resistance. Herein, the paper presents the inverse method which has a high ability to measure the value of cone effective area in various frequency points, also can estimate the MCL electroacoustic parameters simultaneously. The proposed inverse method comprises the direct problem, adjoint problem, and sensitivity problem in collaboration with nonlinear conjugate gradient method. Estimated values from the inverse method are validated experimentally which compared with the measured SPL curve result. Results presented in this paper not only improve the accuracy of lumped parameter model but also provide the valuable information on loudspeaker cone design.
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References:

[1] W. Klippel, "Fast and Accurate Measurement of the Linear Transducer Parameters,” in Proc. 110th AES convention, Amsterdam, May 2001, PN: 5308.
[2] Mark R. Gander, "Ground Plane Acoustic Measurement of Loudspeaker Systems, ” J. of Audio Eng. Soc., vol 30, no. 10, pp.723-731, Oct. 1982.
[3] L. L. Beranek, Acoustics (Acoustical Society of America, New York, 1993). (Original work published by McGraw-Hill, New York, 1954), Chap. 3, pp. 47-77.
[4] W. Klippel and J. Schlechter, "Distributed Mechanical Parameters describing Vibration and Sound Radiation of Loudspeaker Drive Unit,” in Proc. 125th AES convention, San Francisco, Oct. 2008, PN: 7531.
[5] Z. L. Zhang and Q. T. Tao, "Experimental Study of Non-linear Vibrations in a Loudspeaker Cone,” J. of Sound and vib., vol. 248, no. 1, pp. 1-8, 2001.
[6] M. S. Corrington and M. C. Kidd, "Amplitude and Phase Measurements on Loudspeaker Cones,” Proc. of the I. R. E., vol. 39, no. 9, pp. 1021-1026, Sep. 1951.
[7] C. J. Struck, "Analysis of the Nonrigid Behavior of a Loudspeaker Diaphram Using Modal Analysis,” in Proc. 86th AES convention, Hamburg, Mar. 1989, PN: 2779.
[8] J. Schlechter, Visualization of Vibrations of Loudspeaker Membranes, Degree Dissertation, Faculty of Computer Science, Technical University Dresden, Sep. 2006.
[9] H. T. Chen, S. Y. Lina and L. C. Fang, "Estimation of surface temperature in two-dimensional inverse heat conduction problems,” Int. J. of Heat and Mass Tran., vol. 44, no. 8, pp. 1455-1463, 2001.
[10] H. T. Chen and X.Y. Wu, "Estimation of surface absorptivity in laser surface heat process with experimental data,” J. of Phys.. D: App. Phys., vol. 39, no. 6, pp. 1141–1148, 2006.
[11] H. T. Chen, J. H. Lin and X. J. Xu, "Analytical estimates conditions in laser surface heating process with experimental data,” Int. J. of Heat and Mass Tran., vol. 67, pp. 936-943, 2013.
[12] C. C. Wang and C. K. Chen, "Three-dimensional inverse heat transfer analysis during the grinding process,” P. I. Mech. Eng. C-J. Mec., vol. 216, pp. 199-212, 2002.
[13] D. Lesnic, B. B. Mohsin, "Inverse shape and surface heat transfer coefficient identification,” J. Comput. Appl. Math., vol. 236, pp. 1876-1891, 2012.
[14] L. S. Lasdon, S. K. Mitter, A. D. Warren, "The conjugate gradient method for optimal control problem,” IEEE Trans. on Automat. Contr., vol. AC-12, no. 2, pp. 132-138, Apr. 1967.
[15] C. H. Huang, "A nonlinear inverse vibration problem of estimating the time-dependent stiffness coefficients by conjugate gradient method,” Int. J. Numer. Methods Eng., vol. 50, no. 7, pp. 1545-1558, Jan. 2001.
[16] C. H. Huang, "A nonlinear inverse vibration problem of estimating the external forces for a system with displacement-dependent parameters,” J. of Sound Vib., vol. 248, no. 5, pp. 789-807, Dec. 2001.
[17] Y. T. Tsai, C. C. Wang and Jin H. Huang, "An inverse method for estimating the electromechanical parameters of moving-coil loudspeakers,” J. Acoust. Soc. Am., vol. 134, no. 5, pp. 3594-3604, Nov. 2013.
[18] W. M. Leach, Jr. Introduction to Electroacoustic and Audio Amplifier Design, 3rd ed., Dubuque, IA: Kendall Hunt, 2003, pp. 109.
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