sound gr.6
TRANSCRIPT
• You hear a louder sound when you hit the drum with greater force. The drum vibrates with more energy making the air vibrate with more energy.
• As sounds travels a greater distance molecules will vibrates with less force, that is why you hear a sound quieter when its source is further away from you.
Sound bouncing off objects
Sound will bounce
of objects, causing
echo.
Some organisms
are able to feel
their surroundings
using echo, like
bats and dolphins.
Sound pitch
• The pitch is how high, or low a sound is. A child will usually scream at a high pitch. While a man will shout at a lower pitch.
• Making a vibrating string shorter will result in a higher pitch note. Increasing the tension will also increase the pitch. Try it with rubber bands on a tissue box .
Videos to watch on Youtube
• Sound video
• https://www.youtube.com/watch?v=kt1pTcfstC8
• How the ear works
• https://www.youtube.com/watch?v=HMXoHKwWm
U8