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Damping Coefficient and Excitation Coefficient of Leaking Lamb Waves

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Abstract:

The object of this paper is to establish the relation existing between the damping and excitation coefficients of leaking Lamb waves. The theoretical relation between these coefficients is deduced from the Geometrical Theory of Diffraction (G.T.D). This relation shows that the square of the excitation coefficient modulus and the normalized damping coefficient are varying in the same way, for a given Lamb mode. Moreover, under the conditions of the Resonant Scattering Theory (R.S.T.) formalism, they are nearly proportional. The experimental study confirms the theoretical results.

Document Type: Research Article

Publication date: 1997-11-01

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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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