If a tree falls in a forest and no one is there to hear it, does it make a sound? (The question was first posed by the Irish philosopher George Berkeley.) Simply, no—sound is a mental image created by the brain in response to vibrating molecules. Similarly, there can be no pitch without a human or animal present. A suitable measuring device can register the frequency made by the tree falling, but truly it is not pitch unless and until it is heard.
If you want to be a smart ass and answer a philosophical question scientifically
