Acoustic Minesweeping Generator.
DEPARTMENT OF THE NAVY WASHINGTON D C
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In the patent a noisemaker is disclosed which includes an elongated metal pipe with screwthread-like fins that are connected to the outside surface thereof and that extend along substantially the length thereof. One or more clangor rods are disposed within said pipe, and one or more various and sundry shelf-like protrusions are optionally connected to the inside surface of said pipe. The ends of said pipe are effectively closed in such manner as to form a pressure tight chamber therewithin which may be filled with a predetermined pressurized fluid for effecting the resonance frequency tuning thereof. A tractor vehicle tows, by means of suitable cables and swivels, the aforesaid pipe assembly through water or any other environmental medium compatible therewith for the purpose of making it rotate about its longitudinal axis, thereby causing said clangor rods to bang against the inside surface of said pipe.
- Military Operations, Strategy and Tactics
- Acoustic Detection and Detectors