… and there is no one around to hear it, did it make a sound? Silly question, isn’t it. Of course it emits a stimulus that makes a sound, irrespective of whether there was anyone around to witness the auditory event. End of discussion. Or is it?
A philosopher might argue that it hinges on your view of radical skepticism.
A physicist might posit that it emits compression waves, but not sound until the vibrations are interpreted as such.
In other words, the question isn’t so silly when you consider the cilia.
After all, an individual with hearing loss can still experience a sound event by detecting compression waves. Perhaps it all boils down to this: