| 摘要 |
A motor pump impels a substantial volume of water through a rotatable, slotted shutter to modulate the flow of impelled water. A pair of oppositely facing, radiating-piston surfaces is reciprocably displaced in response to the modulated flow to project acoustic energy through a water media. The transducer, by being freely flooded, in independent of changing pressures in the surrounding media and does not require elaborate sealing assemblies, making it ideal for operation at extreme depths. Varying the configuration of the shutter, interconnecting conduits, and varying the angular speed of the shutter afford selective broadband operation, and increasing the flow rate provides a greatly increased power output.
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