Sound Waves

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Across
  1. 4. the medium that sound waves travel through the most slowly
  2. 8. when sound waves are amplified as through a megaphone or yelling through cupped hands
  3. 9. when sound bounces off an object; an echo
  4. 10. the medium that sound waves travel through the best
  5. 11. this measure of a sound wave is related to its
  6. 12. unit of measure of pitch
Down
  1. 1. waves that don't have up and down crests and troughs, but rather have compressions and rarefactions
  2. 2. when sound waves are not able to travel through a substance; for example, wearing earplugs to drown out a loud noise
  3. 3. the unit of measure of volume
  4. 5. when sound is spread or scattered across an area (like the curved ceiling of an auditorium spreads the sound so everyone in the audience can hear)
  5. 6. the measure of sound is related to its
  6. 7. sounds waves cannot travel through this at all