o:2878 Transverse stress wave velocity in northern red oak tree: assessment of the wood quality en In this paper, the transverse wave velocity was investigated, as well as the possibility of assessing the quality of wood in northern red oak trees using the velocities of transverse stress waves. Stress wave velocity was recorded using a 2D acoustic tomograph with appropriate sensors and equipment. The recordings were made on a total of 18 sections on 9 trees from three northern red oak sites in Serbia. Based on the obtained results, it was concluded that the orientation of the annual ring in regard to the direction of sound propagation affects its speed. It was determined that the average stress wave velocity at the cross-sections is 1660 (1159-2350) m/s. However, it is higher in the tangential direction compared to the radial one. The relative difference between the reference and the measured speed was used to assess the quality of the wood. This relative difference indicates the amount of decay between the two sensors. The largest number of cross-sections had a speed loss of up to 10%, but there were also cross-sections with a speed loss of more than 30% in the radial direction. This result shows us that there are defects and damages in this direction that will reduce the strength of the wood, and thus narrow the field of use of wood from this part of the tree. red oak, acoustic tomography, stress wave, assessment, transverse section 1552101 978-99938-56-51-1 2023-10-02T07:47:39.493Z 44 yes 46 Ivana Živanović 0000-0002-1169-4891 2022 46 Nebojša Todorović 46 Danijela Petrović application/pdf 2164898 https://unilib.phaidrabg.rs/o:2878 no yes 1 70 92000004 "Book of abstracts - International Scientific Conference ""Forestry Science for Sustainable Development - FORS2D"", Perspectives of forestry and related sectors as drivers of sustainable development in the post-Covid era, Banja Luka, the Republic of Srpska / Bosnia and Herzegovina " 165 165 Šumarski fakultet Banja Luka 2022