A Platanus occidentalis tree has been selected for examination in a botanical garden (Sopron, Hungary). First the measurement has been conducted with 12 regular sensors and then with an additional 12 Ludwig sensors.
The first measurement using 12 regular sensors shows a decayed area in the middle (about 40%).
The second measurement with additional Ludwig sensors shows a decayed area in the middle (about 32%), and also a strengthened area on the side near sensors 9-12.
The tree suffered a freeze injury several years ago. This is exactly the part where the strengthened wood has been found.