Abstract: A diagnostic vibration analyzing system and method for measuring and characterizing the torsional vibrations in a vehicle or a piece of industrial equipment (collectively a “vehicle”). An electronic control unit and sensor cooperate to measure speed fluctuations occurring between the passing of adjacent teeth of a rotating gear. These time measurements are the basis for displacement, velocity and acceleration calculations which, combined with driveshaft rotational order information, can be used to pinpoint the source of excessive driveline torsional vibrations. The use of multiple sensors can maximize per test the information available for analysis. The use of multiple sensors in a substantially simultaneous manner can isolate particular components in the tested vehicle.

Abstract: An inner garment for aiding evaporative cooling includes a first sheet containing a substantial portion of cotton. One face of the first sheet is worn next to the skin where it acts as a wick for perspiration. A second sheet in the form of a resilient, wrinkled, porous web is disposed against the other face of the first sheet to form an evaporative cooling space when an outer garment is worn over the inner garment. Preferably, a perforated third sheet of woven thermopolastic fibers is disposed over the outer face of the wrinkled web to protect the web and restrict loss of moisture primarily to the evaporative process.