Sound

Sound

1. sound waves can only travel where there are solids , liquids and gases to carry them

2. Musical instruments use vibrations to make sounds. wind instruments, make the air vibrates.

3. Percussion as drums, triangles and cymbals, vibrate when they are hit or tapped

4. loud sound can damage your hearing. Short exposure sounds level 130 db

   • sound reflection
     • sound energy is reflected from hard surfacess such as walls and rocks

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