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The Problem of Energy Balance in Electroacoustic Transducers

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It is well known that reversible transducers (elektroakustische Wandler) may be represented as voltage-sources (M-representation) and as current-sources (N-representation). The relations bstween the transducer coefficients may be derived from the generalized Lagrange-equations, whereby one or the other representation appears according as the magnetic energy is combined with the kinetic and the electric with the potential (Poincare) or vice-versa. But they may also be derived by regarding the powers at input and output. In the case of the electrostatic transducer it is pointed out, that the coupling-two-port, which may be separated, possesses storing qualities at one of the representations. “Ideal transducers” as the transformer or the gyrator appear only if magnetic transducers are treated according to the M-representation and electric transducers according to the N-representation.
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Document Type: Research Article

Publication date: January 1, 1978

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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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