Patent ID: 7697375

Claim:
An apparatus configured for use with an electrically conducting material, the tool comprising: (a) a magnet assembly including a plurality of magnets with alternating polarization in a direction substantially orthogonal to a first direction of a body of the electrically conducting material; (b) a first conductor configured to carry a first current in a direction substantially parallel to the first direction and generate a shear wave in the body upon passage of the first current; (c) a second conductor configured to carry a second current in a direction substantially orthogonal to the first direction and substantially orthogonal to the direction of polarization of the plurality of magnets and generate a Lamb wave upon passage of the second current; (d) a receiving transducer configured to produce signals responsive to the generated shear wave and the generated Lamb wave; and (e) a processor configured to: (I) use the produced signals to estimate a property of the received shear wave and the received Lamb wave, and (II) record the estimated property on a suitable medium.