Tree Talk

When assessing a tree, it may appear healthy with no visible damage, but problems can be hidden beneath the bark, including fungal infections, cavities, insect damage, or weather stress. These issues can weaken a tree, increasing the risk of fractures and branches snapping in high winds, or dropping unexpectedly (summer branch drop). Visual inspections are crucial for the initial assessment, but they do not reveal internal conditions. This is where a sonic tomograph comes in. As a tree care professional, I use this device to assess a tree’s internal health without causing harm. Here’s how it works: 

1. Small sensors are placed around the trunk. 

2. Sound waves are sent through the wood. 

3. The device measures how quickly these sound waves travel. 

4. It produces an image showing solid wood versus decayed areas. 

Because sound waves travel more slowly through decayed wood, the tomograph accurately quantifies the extent of decay, enabling informed decisions about the tree’s future. The findings are confirmed using a PD500 resistograph drill. Often, this assessment tool helps prevent trees from being unnecessarily removed.

Tomograph picture versus the actual tree. Sadly, the client decided to fell the tree.