Document pmjN6V4L6O0GmKmyYmw2GoO5X

CHART 47-C FREQUENCY (CYCLES PER SECOND) Threshold values for perception, discomfort, and tolerance to sinusoidal vibration at a single frequency are plotted on logarithmic coordinates of amplitude (in centimeters) versus frequency (cycles per second) Amplitudes are vector values (deviations each side of an average value) From Human Factors m Air Transportation, by Ross A McFarland New York, N Y , McGraw-Hill Book Co , Inc 1953 1617