Acoustic transducer with spiral-shaped piezoelectric shell
An acoustic transducer includes a polarized piezoelectric shell having a spiral-shaped surface. The acoustic transducer serves as a receiver or a transmitter.In one embodiment, the acoustic transducer includes a solid spiral shell having outer and inner spiral-shaped surfaces, and the shell is polarized, wired and packaged to operate in hydrophone-mode.In another embodiment, the acoustic transducer includes a shell defining an exterior spiral-shaped surface and a spiral slot; and the slot defines a closed cavity with an interior spiral-shaped surface. In a preferred bender-type receiver embodiment, the shell is polarized, wired, and packaged to operate in bender mode for maximum sensitivity and best low-frequency performance.
Schlumberger Technology Corporation
H
H04R
inventional
Hiroshi Chung
Hori Chang