Liberal Forum

Oh man. Ohm is going to go crazy over this.

However, I will try to answer the question. Yes, it has to. Not hearing it seems irrelevant. Sound obeys laws. If the tree fell in a vacuum, then no, it didn't make a sound. Sound needs a medium to travel, which on Earth is the atmosphere around us. So you may as well ask "If a tree falls in the woods absent of surrounding medium, did it make a sound?"