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Über die Dualität der Vierpolgleichungen elektromechanischer Wandler und ihrer elektrischen Vierpolersatzschaltungen

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Attention is drawn to the lack of uniqueness in the two-pole as well as four-pole theory of passive linear electromechanical transducers as regards their four-pole equations and corresponding equivalent circuits. The reason for this is that the notion of the electromechanical coupling factor is not unique. It is shown that the choice of a suitable coupling factor as well as of four-pole equations and corresponding equivalent circuits depends on determined polarisation or loading conditions of the transducer concerned. Two possible four-pole equations and their two corresponding circuits holding for any passive and linear (linearised) electromechanical transducer are given. Attention is drawn to the fact that in the case of parallel or linear electric and magnetic transducers working in improper polarisation or loading condition the additional stiffness caused by the reaction of the electric or magnetic field is positive.
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Document Type: Research Article

Publication date: January 1, 1958

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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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