A method of measuring Young's modulus of elasticity employing a sonic technique is described. This method has the advantage of being usable over a fairly wide range of temperatures, is non-destructive, and is capable of reproducing values to within ±1％. An audio frequency generator is used to drive a long thin bar suspended by a platinum wire from a speaker cone. Another wire attached to a variable reluctance pick-up needle suspends the bar at the other end. An oscilloscope is used to detect the resonant frequency of the bar from the pick-up device. A 3imple relationship reported by Pickett is used to relate the resonant frequency of the bar to Young's modulus.
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