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by vonmoltke
3931 days ago
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> Sound travels at 0.9 miles by second in the sea, so this poses a very interesting question about what should be a theoretical safe distance for a sonar. Maybe somebody here could answer this. I hope they keep the keys for this engine safe and not sound in any case. Speed doesn't matter, it's all about the wavefront. The radar equation provides a rough guide here, in that the power of the signal drops off at a ratio proportional to the distance squared, the r^2 dependency. I have no idea what the rest of the terms in that equation would be, though, as I have only ever done the calculations for RF in air. |
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