Sound crossword

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Across
  1. 2. when sound doesn't move a quickly
  2. 4. a sound made by slower vibrations
  3. 6. something that plays or makes sound
  4. 8. a sound made by really fast vibrations
  5. 10. how we figure out how loud a sound is
  6. 13. when a sound comes back after you already heard it
  7. 14. a sound that stays the same and doesn't change much
  8. 17. a hard material sound can move through, like walls
  9. 18. when your ears pick up sound
Down
  1. 1. when something soaks up sound instead of bouncing it
  2. 3. how sound moves from one place to another
  3. 4. a sound that has a lot of energy and is easy to hear
  4. 5. when sound moves quickly through something
  5. 6. a sound that has less energy and is harder to here
  6. 7. a material like water that sound can move through
  7. 9. when something moves back and forth to make sound
  8. 11. what sound usually moves through so we can hear it
  9. 12. the part of your body that lets you hear sound
  10. 15. a sound that's messy, annoying, or not clear
  11. 16. when sound hits something and comes back