Tapered Cylinder Electro-Acoustic Transducer With Reversed Tapered Driver
Patent, Filed 16 Sep 1997, patented 14 Dec 1999
DEPARTMENT OF THE NAVY WASHINGTON DC
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A slotted cylinder transducer is provided having a cylindrical metal or composite material shell. A cylindrical piezoelectric driver is bonded to the inside of the shell with an opening corresponding to the slot. The shell thickness is tapered radially about the longitudinal axis such that the thickness is a maximum 180 deg away from the slot and decreases progressively to a minimum adjacent each side of the slot. The piezoelectric driver is reverse tapered from the shell taper in that the thickness of the driver is a minimum 180 deg away from the slot and increases progressively to a maximum adjacent each side of the slot. This taper places a larger volume of the driver material in the slot region of the shell where the maximum radial displacements occur, thus providing higher acoustic energy levels. When used as a hydrophone to detect acoustic signals in the surrounding medium, the larger volume of material at the point of maximum displacement provides increased signal detection capability.
- Acoustic Detection and Detectors