Electromagnetic acoustic transducer using magnetic shielding

Details Electromagnetic acoustic transducer using magnetic shielding Electromagnetic acoustic transducer using magnetic shielding

2007-11-01

2011-10-18

Chapman, Jr., John (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

Reexamination Certificate

active

08037765

ABSTRACT:
A combined electromagnetic acoustic transducer (EMAT) is disclosed that uses magnetic shielding to increase the efficiency (defined as the received signal per unit of excitation current). In addition, electromagnetic shielding may also be used to reduce the direct coupling between the transmit and receive coils.

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