Sound

Sound

1. Changing sound

   • Volume changes as you change the amount of energy eg. small amount of energy = quiet sound
     • Volume
   • Pitch
     • Pitch changes depending on the length of the of the vibrating object.
       • You can change the pitch by changing the length of the object
         • Or the tightness

2. Making sound

   • Vibrations make sounds
     • The Vibrations aren't always obvious eg. blowing in a bottle
     • Sometimes they can be obvious eg. violin string.

3. Traveling sound

   • Vibrating objects cause the air or material next to them to vibrate and eventually it reaches or is transmitted to the ear .
     • We hear the sound when it hits our eardrums the vibration is picked up by our brains
   • Sound cannot travel through a vacuum since there are no particles for it to go through . Because it must have particles to travel through.