Natural and anthropogenic events may create low frequency sound waves, or infrasound, that can travel for vast distances in planetary atmospheres. They permit the remote monitoring of geophysical activity over local to global scales. Most studies have utilized ground-based recorders, but it is possible to deploy acoustic sensors to altitudes of over 50 km. Such elevated platforms can capture sounds that their surface analogs cannot access. High altitude balloons and low altitude aerostats are filling this observation gap, but key environments remain out of reach of both of these. Recent work by den Ouden, Smets et al. (2021) addressed this with a new instrumentation platform—a large seabird flying just above the ocean's surface. Their work demonstrates that, infrasound sensing using heavier-than-air platforms in windy environments is possible, which has implications both terrestrially (e.g., extending sensor networks over the oceans) and extraterrestrially (proposed or planned missions to Venus and Titan).

中文翻译：

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机载次声飞溅

自然和人为事件可能会产生低频声波或次声波，它们可以在行星大气中传播很远的距离。它们允许远程监测本地到全球范围内的地球物理活动。大多数研究都使用了地面记录器，但可以将声学传感器部署到 50 公里以上的高度。这种高架平台可以捕获其表面模拟无法访问的声音。高空气球和低空浮空器正在填补这一观测空白，但关键环境仍然遥不可及。den Ouden、Smets 等人最近的工作。(2021) 用一个新的仪器平台解决了这个问题——一只大海鸟在海面上方飞行。他们的工作表明，在有风的环境中使用重于空气的平台进行次声传感是可能的，