That bubbles affect sound propagation in the oceanhas long been known. However,, quantitative data on theconcentrations and distribution of bubbles near the surfaceof the ocean is not available. A one-dimensional,high Q, standing wave system was constructed and evaluatedto determine bubble concentrations by measuring the effectof bubbles on the system Q's. It was tested to depths of40 feet and in the frequency range of 10-100 kHz. Thissystem used a mylar electrostatic transducer as thesound source and also as one of the reflectors. SystemQ's of 3500 were obtained. It was possible to measureattenuation to t 0,019 db/m above 20 kHz. Hydrostatic pressure caused variations in the face of the transducerthereby making the system unstable. The mylar transduceris therefore unsuitable for use as both source andreflector. Initial investigations made into using the mylartransducer to externally excite a reflector-reflectorsystem are also described.
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机译：气泡影响声音在海洋中的传播早已为人所知。但是，没有关于海洋表面附近气泡的浓度和分布的定量数据。构造和评估一维高Q驻波系统，通过测量气泡对系统Q的影响来确定气泡浓度。它在40英尺的深度和10-100 kHz的频率范围内进行了测试。该系统使用了聚脂薄膜静电换能器作为声源，也用作反射器之一。获得3500的SystemQ。有可能在20 kHz以上测量到t 0,019 db / m的衰减。静水压力引起换能器表面的变化，从而使系统不稳定。因此，聚酯薄膜换能器不适合同时用作光源和反射镜。还介绍了使用聚酯薄膜传感器从外部激发反射器-反射器系统的初步研究。
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