With the Minecraft combat update the weapon swoosh when hitting a mob no longer makes sense since Minecraft now has it's own sound for that event. The existing Dynamic Surroundings logic will be modified such that:

• Swinging a weapon or tool when not targeting a mob or block will result in a swoosh.
• Shovels and fishing poles will give the same swoosh sound as a sword.
• Pickaxe will give the same swoosh sound as an axe.