PiCUS Sonic Tomograph – Decay Detection Equipment

PiCUS Sonic Tomograph

A PiCUS test is used for tree risk assessments to determine the extent of internal decay or cavities throughout the stem of a tree. This is done by sending soundwaves through the wood; the density of the wood (extent of decay) is determined by how fast the sound travels through the wood.

The quicker the sound travels the more decayed the wood is. The sound is sent through the wood by using a small hammer and sonic sensors. The soundwaves are recorded electronically by the numbered sensors placed all around the tree stem (as seen below) and the data then transmitted and shown on a graph.

See an example PDF here Picus Sonic Tomograph results – example PDF.