<div class="htmlview paragraph">The frequency response and unit impulse response of man was determined by transient testing and subsequent data processing. In all cases, the response is that of the head for input at the feet or chair base. Vertically, man responds much like a uniform rod. Laterally, the response is similar to that of a nonuniform beam in bending.</div> <div class="htmlview paragraph">Many of the figures presented here are reproduced by the kind permission of the publishers of “Sound and Vibration.”</div>