Here are a few pictures from the Haptics Class Project Open House on April 30, 2010.
Just Noticeable Difference of Frequency of Upper Arm VibrationsThis project tested the just noticeable difference using a vibration motor on the upper arm. This experiment changed the frequency and amplitude starting from pre-determined values and saw how they directly relate to the just noticeable difference (JND) for two different motors. Users put on the device, one on left arm and one on the right arm and were tested to find the JND for each case. The JND was "standardized" into the Weber Fraction. The data collected showed some significant differences between the Weber fractions calculated at each frequency. Based on this data, we can conclude that tactile frequency differentiation may not follow a Weber rule.