Abstract
Diminished tactile sensitivity was induced temporarily in the hands of subjects who gripped a vibrating hand dynamometer. Effects of combinations of various vibration frequencies (30, 60, 120, 240, 480 Hz), power inputs (three levels), and grip strengths (6, 12, 18 1b.) were investigated. Loss of sensitivity was frequency-dependent, being greatest at 60, 120, and 240 Hz. Increased power input to the dynamometer caused increased loss of sensitivity. Grip strength was not found to be a significant factor. Results may be explained through considerations of transfer and absorption of vibrational energy.