ArborSonic 3D Acoustic Tomograph


The ArborSonic 3D Acoustic Tomograph is able to detect the size and location of decayed or hollow regions in the trunk non-destructively. It works based on sound velocity measurements between several sensors around the trunk. The basic measurement principle is that sound velocity drops if there is a hole between two sensors.

  1. Drive the transducers through the bark using a rubber hammer with even spacing around the trunk.
  2. Measure the distances between the transducers with a caliper and enter the measured data to the computer.
  3. Tap each transducer with a steel hammer to generate sound waves. ArborSonic 3D measures the travel times with microsecond precision to each transducer and transmits the data to the computer.
  4. The software calculates and displays the internal sound-velocity distribution of the tree.
  5. Measurements taken at various heights can be assembled into a 3D model.
  • SD02 Piezo transducers
  • Amplifier boxes
  • Battery box
  • Cables to connect amplifier boxes and battery box
  • Sensor remover tool
  • Tape measure
  • Steel hammer for tapping transducers
  • Rubber hammer for mounting the transducers
  • Peli case
  • 2pcs. of rechargeable 9 V block batteries
  • Battery charger
  • User's manual
  • ArborSonic 3D Software
  • Caliper for measuring sensor positions (optional)
Measured time precision
± 2 microseconds
Low noise SD02 piezo sensor
Number of sensors
Variable from 8 up to 32
Amplifier box size
127 x 58 x 25 mm
Power consumption
240 mW
Power supply
Standard (rechargeable) 9V block battery
Continuous operation time *
Approximately 2 hours
Carrying case
Total weight **
6 kg
PC connection
RS232 over cable or Bluetooth
Data transmission time per sensor tap
Below one sec
Total measurement time of one tree ***
20 minutes
Operating temperature range
0-40 °C

*with one battery
**without PC, including case, hammers and 10 sensors
***one section, including assembly, geometry registration, tapping and disassembly, using 10 sensors
  •  ArborSonic 3D 5 for Windows (version: 5.2.115, size: 9.2MB)
  •  ArborSonic 3D for Android
  •  ArborSonic 3D Acoustic Tomograph (size: 1,4 MB)
  •  Sample .f3d file for ArborSonic 3D - Platanus (size: 202 KB)
  •  Sample .f3d file for ArborSonic 3D - Poplar (size: 71 KB)