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Motor Nonlinearities in Electrodynamic Loudspeakers: Modelling and Measurement

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
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
Rocznik
Strony
579--590
Opis fizyczny
Bibliogr. 17 poz., wykr.
Twórcy
autor
autor
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
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