This is in response to Letums excellent thread.
In most of the books that I have read about the U-Boats the men describe the sound as..."a hammer hitting the hull! or..."gravel being dropped on the hull!"
This is due to high frequency sound waves rebounding from the hull at a frequency that the human ear can detect! [Hitman's excellent comments.]
In this mod I have attempted to recreate that sound!
Link:
http://files.filefront.com/BritishAs.../fileinfo.html
Its fully JGME ready.
KUrtz