Sound and Hearing

Sound and Hearing

1. Sound energy is a form of energy. it is made by things when vibrations are transformed into sound energy.

   • A vibration is a fast, backwards and forwards movement that repeats many times.
     • Objects always vibrate side to side of their normal position.
       • Vibrations can travel through materials including water, earth and wood.

2. Sounds can often vary in loudness. Thunder is a very loud sound and a whisper is a very quiet sound.

   • A loud sound has more energy than a quiet sound.