In this Thursday episode of Talking Trees, we delve into the use of acoustic tomography—specifically the PiCUS Sonic Tomograph and TreeTronic systems—for diagnosing hidden internal decay in trees.

We discuss:

• How sound waves and electrical resistance are used to map internal wood structure without damaging the tree
• The key steps in setting up, calibrating, and interpreting tomograms, including common challenges like the “cogwheel effect”
• Insights into the biology of wood-decay fungi and how tomographic tools can detect and predict the development of decay
• Case studies from managed spruce and oak stands, comparing tomographic data with stump analyses and visual assessments
• The value of combining acoustic and electrical tomography in urban tree risk assessments and long-term tree preservation strategies

Acoustic tomography represents a powerful, non-invasive way to understand what’s going on beneath the bark—helping arborists make informed, science-based decisions.

Background information:

• Göcke. 2017. PiCUS Sonic Tomograph Software Manual Q74.pdf
• Schwarze. 2008. Diagnosis and prognosis of the development of wood decay in urban trees.pdf
• Tamu et al. 2022. The Application of Sonic Tomography (PiCUS 3 Sonic Tomograph) to Detect and Quantify Hidden Wood Decay in Managed Norway Spruce Stands.pdf
• Wang et al. 2007. Acoustic Tomography for Decay Detection in Red Oak Trees.pdf
• iml. 2021. Picus Treetronic Manual.pdf

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