Dowsing /theory/ states, that the body of the dowser is the /medium/ and the dowsing rods is merely an amplification of the signal communicated. In order to minimize physical distractions, which might influence the concentration of the dowser, it would be worth thinnking about ways of reducing the physical stimuli received from the environment.
One simple way is to conduct dowsing with the eyes shut, thus eliminating visual perceptions and also any observations of the dowsing rod movement. When dowsing with an Y-Rod, one can acutally not feel whether the Y-Rod is moving or not. A certain amount of pressure is applied to it, disabling most of the conscious control over the device. But with our 3D – Accelerometer enhanced rods, we will be able to detect and analyse (“hindcast”) the motions of the dowsing rods – even when conducted as blind dowsing sessions.