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Picture of New Acoustic Technology Evaluates Wood Quality of Standing Trees
FPL-2013-138
New Acoustic Technology Evaluates Wood Quality of Standing Trees

Title: Acoustic evaluation of wood quality in standing trees. Part I, Acoustic wave behavior

Author: Wang, Xiping; Ross, Robert J.; Carter, Peter

Date: 2007

Source: Wood and fiber science. Vol. 39, no. 1 (2007): pages 28-38.

Publication Series: Miscellaneous Publication

Description: Acoustic wave velocities in standing trees or live softwood species were measured by the time-of-flight (TOF) method. Tree velocities were compared with acoustic velocities measured in corresponding butt logs through a resonance acoustic method. The experimental data showed a skewed relationship between tree and log acoustic measurements. For most trees tested, observed tree velocities were significantly higher than log velocities. The results indicate that time-of-flight measurement in standing trees is likely dominated by dilatational or quasi-dilatational waves rather than one-dimensional plane waves. To make appropriate adjustments of observed tree velocities, two analytical models were developed for the species evaluated. Both the multivariate regression model and dilatational wave model were effective in eliminating deviation between tree and log velocity and reducing variability in velocity prediction.

Keywords: Acoustic velocity, time-of-flight, dilatational wave, Poisson's ratio, standing trees, logs, regression analysis, multivariate analysis, wood grading, trees, acoustic properties, nondestructive testing, wood quality, softwoods, mechanical properties, nondestructive testing, standing trees

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Citation:


Wang, Xiping; Ross, Robert J.; Carter, Peter 2007. Acoustic evaluation of wood quality in standing trees. Part I, Acoustic wave behavior. Wood and fiber science. Vol. 39, no. 1 (2007): pages 28-38.

 


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