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Fractional Modeling on Moving-coil Loudspeaker Linear System

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The fractional order derivatives have been used in modeling the lossy inductance as well as the creep effect for moving-coil loudspeakers. Based on the fractional lossy inductance model and the fractional standard linear solid model, this work presented a fractional equivalent electrical circuit (FEEC) for modeling the linear behaviors of moving-coil loudspeakers. The fractional transfer function between the displacement and the input voltage was approximated by the modified Oustaloup filter method, and then the displacements of the FEEC in time domain were numerical calculated. Comparisons between the measured data and the predicted ones illustrate that, the FEEC presented by this paper can do a good job in modeling the linear behaviors of loudspeakers and hand accurate transfer functions in frequency domain as well as the output displacements in time domain.
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Document Type: Research Article

Publication date: 01 September 2017

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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