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Speed of Sound Impulse Propagation in Pine Wood. P. 78–85

Версия для печати

Section: Biology

UDC

581.524.346

Authors

Tyukavina Olga Nikolaevna
Forestry Engineering Institute, Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia)
е-mail: tyukavina@agtu.ru

Abstract

The quality of wood can de effectively assessed using Arbotom impulse tomography unit. In order to apply acoustic tomography for tree structure analysis one needs to create speed of sound propagation scales for various wood species. The paper analyzes the speed of sound impulse propagation in pine wood under various growing conditions. We found that in healthy wood the speed ranges from 1,400 to 2,000 m/s and in pine wood growing on marshes – from 2,000 to 2,600 m/s. Pine wood growing on soils with similar water regime showed no significant differences in the speed of sound impulses. No significant correlation was found between the speed of sound propagation in the wood and its morphometric parameters or age of the tree on either of the test areas. In addition, we singled out some peculiarities of the use of Arbotom unit and found that it fails to reveal wood decay in its initial stages. To assess the quality of wood we recommend ignoring the indications of series-connected sensors.

Keywords

acoustic tomography, quality of wood, pine, speed of sound impulse propagation
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