Accession Number : ADD001396

Title :   Very Low Frequency Sonar Projector.

Descriptive Note : Patent,


Personal Author(s) : Abbott,Frank R

Report Date : 03 Sep 1974

Pagination or Media Count : 6

Abstract : The patent describes a low-cost projector of acoustic energy fabricated from an elongate block of wood provided with a cavity. A cover, also made of wood, is fitted over the cavity and a motor-driven rotary electric vibrator is secured to the elongate block via a plurality of bolts. The wooden cover is coupled to the vibrator by several resilient vibration isolation mounts and the block and cover are encased in a resilient sleeve clamped at opposite ends. Thusly constructed and additionally provided with a coaxial duct through which the towing and power cables reach, a low-cost, high-energy projector of acoustic energy is provided which is capable of being operated at very low frequencies due to the selectivity of vibrator driving speeds and of the stiffness of the resilient vibration mounts.

Descriptors :   *Sonar projectors, *Patents, Very low frequency, Transducers

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE