[WIP] Sonar Realism & Prop Counting

[LukeFF]

Originally Posted by vickers03

hmm, i thought the sonar had different filters used on purpose, switched around to filter some unwanted sounds out.
so RFB sounds wouldn't be automatically wrong.
since filters are not modelled in the game it doesn't really matter if low or hi sounds are taken

All of the RFB hydrophone sounds are taken from the HSNA website, so the filter settings will vary a bit, but they should be all within the same general range.