A COMPARISON OF VIBROTACTILE THRESHOLDS ON THE FINGER OBTAINED WITH DIFFERENT EQUIPMENT

Vibrotactile thresholds on the finger have been compared using two alt ernative systems. One system prescribed the push force, the contact fo rce, and the surround, while this was not defined for the other system . The experiment was performed with nine male subjects attending on th ree different days. It was found that the two systems yielded vibrotac tile thresholds which were significantly different. The dependence of vibrotactile thresholds on the frequency of vibration, the area of con tact with vibration, the conditions surrounding the contact area, the contact force, the push force, the finger temperature, and the distort ion of waveform must be considered when quantifying vibrotactile thres holds.