Accession Number : ADD011613

Title :   Deep Ocean Wide Band Acoustic Baffle.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Held,J L ; Collins,K D ; Mackelburg,G R

Report Date : 11 Dec 1984

Pagination or Media Count : 7

Abstract : In this patent hydroacoustic transducer provides an improved hemispherical radiation pattern throughout a wide range of operating depths. A can-shaped transducer is nestled in the inside of a hat-shaped array of hollow spheres. Resiliently mounting the spheres with respect to each other and a hat-shaped shell holds the array away from the surface of the transducer and layering the hollow spheres assures the hemispherical pattern. Fashioning the spheres from hemispherical shells of aluminum and bonding them together makes the array insensitive to greater or lesser hydrostatic pressures and potting the array in polyurethane presents a more rugged structure capable of withstanding the routine abuses of the ocean environment.

Descriptors :   *PATENTS, *SONAR TRANSDUCERS, *BATTLES, *UNDERWATER SOUND EQUIPMENT, DEEP OCEANS, BROADBAND, OCEAN ENVIRONMENTS, HYDROSTATIC PRESSURE, UNDERWATER SOUND SIGNALS, RADIATION PATTERNS, SPHERES, RUGGEDIZED EQUIPMENT, HEMISPHERES, ACOUSTIC REFLECTION, ALUMINUM, HEMISPHERICAL SHELLS, POLYURETHANE RESINS

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE