Magnetostrictive acoustic transducer
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United States of America Patent
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-
Dec 29, 1987
Grant Date -
N/A
app pub date -
Jul 23, 1981
filing date -
Jul 23, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An acoustic transducer is provided that uses a layer of magnetostrictive ferromagnetic material having high magneto-mechanical coupling. The ferromagnetic material is adhered to a part of the outer surface of a resilient rod, so that an incident acoustic signal causes a change in stress in the magnetic material and, in turn, a change in the material's magnetization. An electrical coil surrounds the magnetic material and converts the changing magnetization into an electrical signal. A plurality of transducers may be assembled into an array and towed behind a ship to detect underwater acoustic signals.
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