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The influence of wood density on longitudinal wave velocity determined by the ultrasound method in comparison to the resonance longitudinal method

Bestimmung des Einflusses der Holzdichte auf die Longitudinalwellengeschwindigkeit anhand der Ultraschallmethode und dem Längsschwingungsverfahren

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Abstract

The paper deals with the relationship between density and the velocity of sound wave propagation in wood. The wave velocity was measured using the heartwood of doussie (Afzelia bipindensis), merbau (Intsia bijuga), panga panga (Miletia stuhlmannii Taub.), tigerwood (Astronium graveolens Jacq.) and zebrano (Microberlinia brazzavillensis) by the two methods: ultrasound and resonance longitudinal. The velocity measured by the ultrasound method was always higher than the values gained by the resonance longitudinal method. However, there is a high correlation between the results of both methods. A change in sound wave velocity due to a change in density was not confirmed for any of the species. A similar conclusion was reached in the comparison among species.

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Acknowledgements

The paper was written within grant project IGA 43/21010 “The relationship between wood anatomical structure and selected acoustic properties” and with support of research intent of Mendel university in Brno, Faculty of Forestry and Wood Technology, MSM 6215648902. Authors would also like to thank the producer of wooden floors, MAGNUM Parket a.s., for the supply of materials used in the experiment.

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Authors and Affiliations

  1. Faculty of Forestry and Wood Technology, Department of Wood Science, Mendel University in Brno, Zemědělská 3, Brno, 61300, Czech Republic

    Jan Baar, Jan Tippner & Vladimír Gryc

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  1. Jan Baar
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  2. Jan Tippner
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  3. Vladimír Gryc
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Correspondence to Jan Baar.

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Baar, J., Tippner, J. & Gryc, V. The influence of wood density on longitudinal wave velocity determined by the ultrasound method in comparison to the resonance longitudinal method. Eur. J. Wood Prod. 70, 767–769 (2012). https://doi.org/10.1007/s00107-011-0550-2

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  • DOI: https://doi.org/10.1007/s00107-011-0550-2

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