Running the game on Linux (Ubuntu 16.04), I find that I have very little in the line of sound. Here's what I do hear, although very quiet:
- Throwing the hook
- A faint sound when I'm getting thirsty
- A planting sound
- Placing construction
Again, all of those are extremely faint. The shark attacking the boat is utterly silent, and I don't hear anything when I hit it with the spear either. The only way I know the shark is attacking is if I see it.