I am not saying that sound waves and vibrations are not created. They certainly are, whether we can perceive them or not. However, different beings can interpret the same sound waves differently; sound is not a constant. In my mind this proves that "sound" is only a label for the way we perceive any given sound wave. There is a flaw in your example about infrared or ultraviolet waves. We know these waves exist just like we know the sound waves exist. Human anatomy does not have any sensory organs for registering these waves so they are not a fair comparison. Again, the I am not debating the existence of sound waves, only the point at which they become what we recognize as "sound".

I agree and understand your point. I suppose the essence of my argument is that Potential for sound does not imply sound. Sound waves are natural and unavoidable in this situation. They only become what we understand as sound when they enter a functioning ear.

In my mind no. I think about the question assuming that "no one" means no conscious creature with a brain and ears (or variations of ears). Obviously this is an assumption and I know it could never happen in a real world scenario but we need to assume certain things to have a concrete answer to a question like this.

Sound is simply the way a brain is designed to interpret varying frequencies and amplitudes of vibrations. No brain, no sound, simple as that.