does a tree make a sound if it falls and nobody is there to hear it?

Question: does a tree make a sound if it falls and nobody is there to hear it?
- Keywords:
  philosophy
Asked by no1southendfan to Angela, Gopal, Hannah, Becky, Vince on 19 Jun 2013.
- Hannah Little answered on 19 Jun 2013:
  
  Yes, sound is vibrations in the air that still exist even if no one is about. However, if you define sound as something that is perceived then it can’t be perceived if no one’s there. So it depends on your definition of sound, but I’d say yes.

Question: does a tree make a sound if it falls and nobody is there to hear it?