Sonic tomography, or the use of sound waves to detect decay in trees, is a relatively new technology available to arborists. This technology uses the differential speed of sound as it moves through solid wood, decayed wood, or hollow space to create a two- or three-dimensional image of the internal structure of a tree. Knowledge of the internal structure can then be used by a qualified arborist as part of an advanced tree risk assessment.
Bartlett: Sonic Tomography
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