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公开(公告)号：US4855964A
公开(公告)日：1989-08-08
申请号：US216504
申请日：1988-07-08
CPC分类号： H04R17/00 , B06B1/0655
摘要： A piezoelectrically-driven, resonant-pipe projector has formed therein vents to broaden the response of certain cavities resonances and to increase the response between these resonances. The projector exhibits a relatively high electroacoustical efficiency, is capable of medium to high power output over the operating band, and is not depth dependent or depth limited.
摘要翻译： 在其中形成有压电驱动的谐振管式投影仪，以扩大某些空腔谐振的响应并增加这些谐振之间的响应。 投影机具有相对较高的电声效率，能够在工作频段内具有中等至高功率输出，并且不受深度依赖或深度限制。
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公开(公告)号：US5382286A
公开(公告)日：1995-01-17
申请号：US91297
申请日：1993-07-15
IPC分类号： C08L5/08 , G01S7/524 , G10K11/00 , G10K11/02 , C09D105/08
CPC分类号： C08L5/08 , G10K11/006 , G10K11/02 , G01S7/524
摘要： A method for reducing cavitation around underwater acoustic projectors is described. The projector is cleaned with a surfactant and then encapsulated with an aqueous gel containing a polysaccharide polymer such as a chitosan derivative, a hydrophilic stabilizer and a biocide.
摘要翻译： 描述了一种减少水下声学投影仪周围气蚀的方法。 投影仪用表面活性剂清洗，然后用含有多糖聚合物如壳聚糖衍生物，亲水性稳定剂和杀生物剂的含水凝胶包封。
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公开(公告)号：US4162476A
公开(公告)日：1979-07-24
申请号：US734407
申请日：1976-10-21
申请人： Bryce L. Fanning
发明人： Bryce L. Fanning
CPC分类号： B06B1/0655
摘要： A hydrophone which provides for cancellation of signals caused by acceleration forces and variations in water pressure head. The structure is comprised of a transducer for sensing an acoustic pressure wave as well as an acceleration force, and an accelerometer, which is isolated from the acoustic pressure wave, for sensing only the acceleration force. The transducer and the accelerometer are connected so as to subtract the acceleration output. Only the acoustic pressure wave output signal remains. Circuitry is also provided for cancelling the pressure head signal.
摘要翻译： 一种水听器，用于消除由加速力引起的信号和水压头的变化。 该结构包括用于感测声压波和加速力的换能器，以及与声压波隔离的用于仅感测加速力的加速度计。 连接传感器和加速度计，以减去加速度输出。 只有声压波输出信号保留。 还提供了用于消除压头信号的电路。
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