Quote:
Originally Posted by lwcamp
My understanding is that active sonar is enough of a danger that the U.S. Navy doesn't use it when divers are in the water. This is one of those areas where more data would be helpful. Nonetheless ( https://en.wikipedia.org/wiki/Sonic_weapon)
- and military sonars get up to about 235 dB, around 100,000 times higher intensity than the threshold for injury.
The higher the frequency of the sonar beam, the farther away it can be focused, so early uses of weaponized sonar might just use the standard sonar array. Once it was found to be effective, it would be modified as a weapon to produce higher power higher frequency beams. |
What kind of stats are we talking here?
Are we talking some kind of directional wave area of effect?
What skill would one use to target it and how difficult would it be to catch a man-sized target in it?
What kind of range and damage might a fairly regular SSK sonar array be capable of?
What about a smaller array that might be mounted below a PCs' yacht for self-defence purposes in waters with an ultraterrestial presence?
Quote:
Originally Posted by lwcamp
And just to be complete, there is a second method of injury from sonar. If the intensity gets high enough, the low pressure phase of the wave will fall to below the vapor pressure of water and the water will "boil". This produces a cavitation bubble, that collapses during the high pressure cycle of the wave. Collapsing cavitation bubbles can cause significant material damage, such as damaging steel propellers, and mantis shrimp are known to weaponize cavitation bubbles to aid with cracking hard-shelled prey items (in this case generated by impact rather than by a sonar wave). You don't want cavitation while your sonar beam is propagating through water (this would scatter the sound waves and ruin the beam), but if it occurs at your target the effects could be messy. This can be achieved since the amplitude of the pressure waves will increase when the wave reflects off the target, and if the beam is focused from a wide array where it is generated to a smaller spot at the target.
Luke
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Would this represent smaller AoE and higher damage?
How would you model this in game terms?