Guitar Explanation

 If You play a guitar when it will vibrate from the strings to the nearest object around it and back. Then it would go to your eardrum and go forward and backward. Also when you make a noise it will make sound waves in the air which you can't really see. If you play a low chord it will be a low pith but if you play a high pitch. So if you play a guitar it could ply high and low pitch which head to your ear molecules.