The sound pressure level (SPL) of the moving-coil

\r\nloudspeaker (MCL) is often simulated and analyzed using the lumped

\r\nparameter model. However, the SPL of a MCL cannot be simulated

\r\nprecisely in the high frequency region, because the value of cone

\r\neffective area is changed due to the geometry variation in different

\r\nmode shapes, it is also related to affect the acoustic radiation mass and

\r\nresistance. Herein, the paper presents the inverse method which has a

\r\nhigh ability to measure the value of cone effective area in various

\r\nfrequency points, also can estimate the MCL electroacoustic

\r\nparameters simultaneously. The proposed inverse method comprises

\r\nthe direct problem, adjoint problem, and sensitivity problem in

\r\ncollaboration with nonlinear conjugate gradient method. Estimated

\r\nvalues from the inverse method are validated experimentally which

\r\ncompared with the measured SPL curve result. Results presented in

\r\nthis paper not only improve the accuracy of lumped parameter model

\r\nbut also provide the valuable information on loudspeaker cone design.<\/p>\r\n",
"references": null,
"publisher": "World Academy of Science, Engineering and Technology",
"index": "International Science Index 92, 2014"
}