Of course it makes a sound. Sound waves are generated and propagate through the air. That's sound, same as a flashlight creates light whether anyone sees it or not.
What is "alive"? It certainly entails reacting to electrical stimuli, so we are, of course, alive.
Philosophy, bah!
But that reminds me of my favorite comic book cover. An old issue of the Punisher, standing grimacing combat stance in the woods with two smoking pistol/gun things. The issue title was
"If a tree falls in the forest and no one is left alive to hear it...?"
-dale