论文标题
将智能手机用作言语：水下声学中的两个实验
Using smartphones as hydrophones: two experiments in underwater acoustics
论文作者
论文摘要
在过去的几年中，越来越清楚的是，智能手机是几乎到处使用的有价值的工具。直到最近，水生媒体仍然抗拒智能手机的猛烈抨击。但是，如今，许多现代智能手机具有防水性，其麦克风的性能足以将其用作水音器。该功能产生了几个有趣的应用程序。在这里，我们描述了水下声学中的两个实验，这些实验需要两台智能手机 - 至少一个应该防水。第一个实验包括对水中的声速的简单飞行时间测量以及与空气中相应值的比较。第二个实验通过比较声音到达在两个不同的介质（在这种情况下的空气和水）中传播的声音所需的时间来处理遥远物体的声学位置或范围。
During the last years, it has become increasingly clear that smartphones are valuable tools to be used almost everywhere. Until recently, a place that still resisted smartphone onslaught was the aquatic media. However, nowadays, many modern smartphones are waterproof and the performance of their microphones results sufficiently adequate to employ them as hydrophones. This capability gives rise to several interesting applications. Here, we describe two experiments in underwater acoustics which require two smartphones -- at least one should be waterproof. The first experiment consists in a simple time-of-flight measurement of the sound speed in water and the comparison with the corresponding value in air. The second experiment deals with the acoustic location -- or ranging -- of a distant object by comparing the time it takes for the sound to reach the object travelling in two different media (air and water in this case) with known sound speed.
