1. A system for determining a property of an object, the system comprising: an inducing arrangement for generating an impulse of fluid having a duration of less than about 5 milliseconds and for directing the impulse of fluid towards the object to induce a physical vibration of the object, wherein the inducing arrangement does not contact the object when inducing the vibration of the object; a detector for detecting the physical vibration of the object, wherein the detector does not contact the object when detecting the physical vibration of the object; and a processor coupled to the detector for determining the property of the object based on at least the detected physical vibration.