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Acoustic Propagation in Waterlogged Wood

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Abstract:

While ultrasound is an established technique for the non-destructive evaluation of both cut timber and standing trees, it has not been applied to water-saturated wood. Hence, laboratory experiments were performed to discover the acoustic propagation mechanism in wood. If valid, the Biot model for acoustic waves in porous media should allow the prediction of laboratory measurements (taken at 300–1200 kHz). The results show that, for the best obtainable input parameters, the Biot theory models the observed anisotropy between the longitudinal, radial and tangential directions in wood. The model also predicts velocity dispersion of 1.4% between 300–1000 kHz in the longitudinal direction while that observed was 4.2%.

Document Type: Research Article

Publication date: September 1, 2002

More about this publication?
  • 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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