SkyBaron's Bold SFX for SH5 v 1.0
This mod will add the fizzing sound effect of calcium hydride reacting with sea water to the default "mute" bold decoys. It also makes the decoys audible through the hydrophone.
Quick video showing the effect:
I've used volodya61's "All sounds included" sh.sdl, so this mod should be compatible with most mods that change sh.sdl.
Download Link: http://www.mediafire.com/?qe2ktv1tsd9uf5f
Hope you enjoy it!