This compound applies noise (4D) to add turbulence to the particle velocity.
Plug this compound's Execute output into an Execute on Emit port of the Emit compound, or any Execute port of other compounds such as Slide on Surface, Bounce on Surface, or Stick to Surface.
You can also plug its Execute output into a Port on the ICETree node.
For more information on turbulence, see Turbulizing the Particle Velocity [ICE Particle Simulations].