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Abstrakty
This paper studies the motor nonlinearities of a classical electrodynamic loudspeaker. Measurements show the dependence of the voice-coil inductance with its position and with the driving current as well as the force factor dependence on the coil position. They allow the tuning of the parameters of a model proposed for these dependences. Time and frequency analysis of the model help in the explanation of both the harmonic and intermodulation distortions observed in classical loudspeakers
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
Strony
579--590
Opis fizyczny
Bibliogr. 17 poz., wykr.
Twórcy
autor
autor
autor
autor
- LAUM, CNRS, Université du Maine Av. O. Messiaen, 72085 Le Mans Cedex 9, France, guy.lemarquand@univ-lemans.fr
Bibliografia
- [1] Thiele A.N., Loudspeakers in Vented Boxes, Parts I and II, J. Audio Eng. Soc., 19, 382-392, May 1971; 471-483, June 1971.
- [2] Small R.H., Direct-Radiator Loudspeaker System Analysis, J. Audio Eng. Soc., 20, 383-395, June 1972.
- [3] Klippel W., Speaker Auralization - Subjective Evaluation of Nonlinear Distortion, 110th AES Convention, Preprint #5310, Holland, Amsterdam 2001.
- [4] Dobrucki A., Nontypical effects in an Electrodynamic Loudspeaker with a Nonhomogeneous Magnetic Field in the Air Gap and Nonlinear Suspensions, J. Audio Eng. Soc., 42, 7/8 (1994).
- [5] Klippel W., Tutorial: Loudspeaker Nonlinearities - Causes, Parameters, Symptoms, J. Audio Eng. Soc., 54, 10 (2006).
- [6] Lemarquand G., Ironless Loudspeaker, IEEE Trans. Mag., 43, 8, 3371-3374 (2007).
- [7] Vanderkooy J., A Model of Loudspeaker Driver Impedance Incorporating Eddy Currents in the Pole Structure, J. Audio Eng. Soc., 37, March 1989.
- [8] Merit B. et al., In Pursuit of Increasingly Linear Loudspeaker Motors, IEEE Trans. Mag., 45, 6, 2867-2870 (2009), doi 10.1109/TMAG.2009.2018780.
- [9] Remy M. et al., Ironless and leakage free voice-coil motor made of bonded magnets, IEEE Trans. Mag., 44, 11, 4289-4292 (2008), http://dx.doi.org/10.1109/TMAG.2008.2003401.
- [10] Ravaud R. et al., Magnetic pressure and shape of ferrofluid seals in cylindrical structures, J. of Applied Physics, 106, 3, 34911 (2009), doi.org/10.1063/1.3187560.
- [11] Ravaud R. et al., Radial Stiffness of a ferrofluid seal, IEEE Trans. Mag., 45, 10, 4388-4390 (2009), doi.org/10.1109/TMAG.2009.2022018.
- [12] Ravaud R. et al., Time-varying Non Linear Modelling of Electrodynamic Loudspeakers, Appl. Acoust. (2008), doi:10.1016/j.apacoust.2008.05.009.
- [13] Mowry S., Simplified Simulation Method for Nonlinear Loudspeaker Parameters, Voice Coil Mag., 9 (2007).
- [14] Cunningham W.J., Non-linear Distortion in Dynamic Loudspeakers due to Magnetic Effects, J. Acoust. Soc. Am., 21, 3, May 1949.
- [15] Ravaud R. et al., Design of ironless loudspeakers with ferrofluid seals: Analytical study based on the coulombian model, Progress In Electromagnetics Research, PIER B 14, pp. 285-309 (2009), doi:10.2528/PIERB09031904.
- [16] Ravaud R. et al., Modeling an ironless loudspeaker by using three-dimensional analytical approaches, Progress In Electromagnetics Research, PIER 91, pp. 53-68 (2009), doi:10.2528/PIER09021104.
- [17] Merit B. et al., Ironless Low Frequency Loudspeaker Working Under its Resonance Frequency, Archives of Acoustics, 33, 4, Supplement, 59-64 (2008
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUS8-0019-0027