Oh, no, you don’t. This is one of those pointlessly endless questions with an answer that depends on how you define sound.
If you define sound as “vibrations within a certain frequency,” then the answer is yes.
If you define it as “something perceived by an ear,” then the answer is no.
So to answer the question, ff a tree falls in the forest with no one around to hear it does it still make a sound? It depends.
