Patent ID: 6829929
Filing Date: 2004-12-14
Classification: B06B,G01H,G10K

Abstract:
A loading probe for testing an acoustic transducer, including an elongated solid first body portion for carrying a piezo-electric test element, which elongated solid first body portion is shaped from a first material and capable of simulating the normal acoustic impedance presented to a transducer to be tested by a medium in which the transducer is to operate, and an elongated solid second body portion made from an acoustically absorbent material having acoustic impedance characteristics substantially matched with those of the first material from which the first body portion is made, with the second body portion being attached at one end to one end of the first body portion, characterised in that the second body portion is substantially rod like in shape and wherein the material from which the second body portion is made is an elastomeric polyurethane having an absorption coefficient higher than that of said first material over a temperature range of 5Â° C. to 130Â° C.