How Does Sound Travel?  Created By: Ms. Ruszala
What is sound?          Just like light, sound is a           type of energy.          You can hear sound and           ...
Sound Waves   Sound travels in    invisible waves.   Unlike light waves,    sound waves must    travel through    matter.
Sound can travel through air,  water, or solid materials.
Sound Waves   Sound waves, such as those    made by beating a drum,    vibrate the air around them.   Then those vibrati...
Volume   Volume describes how loud or soft a sound is.   Examples of loud sounds include a lion’s roar    or a jet landi...
Pitch      Pitch describes how low or       high a sound is.      When matter vibrates       quickly, it produces a high...
How do you hear sound?             The sound waves hit the eardrum              and cause it to vibrate.             The...
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Sound12.2.07 Carlolyn Ruszala

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How sound travels, pitch and volume. Also how the ear works.

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Sound12.2.07 Carlolyn Ruszala

  1. 1. How Does Sound Travel? Created By: Ms. Ruszala
  2. 2. What is sound?  Just like light, sound is a type of energy.  You can hear sound and sometimes you can even feel it.  All sounds, from dogs barking to children laughing, are made when matter vibrates, or moves quickly back and forth.
  3. 3. Sound Waves Sound travels in invisible waves. Unlike light waves, sound waves must travel through matter.
  4. 4. Sound can travel through air, water, or solid materials.
  5. 5. Sound Waves Sound waves, such as those made by beating a drum, vibrate the air around them. Then those vibrations move through the air until they reach your ear.
  6. 6. Volume Volume describes how loud or soft a sound is. Examples of loud sounds include a lion’s roar or a jet landing. Examples of low-volume sounds include a bird chirping or a breeze blowing through the trees.
  7. 7. Pitch  Pitch describes how low or high a sound is.  When matter vibrates quickly, it produces a high sound.  When matter vibrates slowly, it produces a low sound.  Would you expect the flute to play a sound with a low pitch or a high pitch?
  8. 8. How do you hear sound?  The sound waves hit the eardrum and cause it to vibrate.  The eardrum causes three tiny bones to vibrate.  When the tiny bones vibrate, they cause a liquid inside the ear to vibrate.  The liquid carries the sound waves to a nerve that carries a message to the brain.  Then you hear the sound.

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