Title: Acoustic evaluation of wood quality in standing trees. Part I, Acoustic wave behavior
Author: Wang, Xiping; Ross, Robert J.; Carter, Peter
Source: Wood and fiber science. Vol. 39, no. 1 (2007): pages 28-38.
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
View and Print this Publication (180 KB)
- 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.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility
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..