Sound Wave and Hearing Puzzle

12345678910111213141516171819
Across
  1. 1. how high or low a sound is
  2. 6. particles of a medium vibration in the same direction
  3. 7. what frequency is expressed in
  4. 8. a longitudinal wave that is caused by vibrations
  5. 11. particles that move perpendicularly to the direction the wave travels
  6. 14. the use of echoes, or reflected sound waves to find objects
  7. 16. a measure of how far the particles in the medium move away from their normal rest position
  8. 17. a disturbance that transfer energy for one place to another
  9. 19. a wave that requires a medium through which it travels
Down
  1. 2. two or more waves overlapping or combine to form one wave.
  2. 3. a change in the observed frequency
  3. 4. a disturbance in electric and magnetic field
  4. 5. the speed at which waves travel
  5. 9. a system that uses sound waves to determine the location of objects to communicate
  6. 10. a measurement of how loud something is
  7. 12. when a sound wave matches the natural frequency of an object and causes the object to vibrate
  8. 13. how to measure loudness
  9. 15. sound waves that have frequencies greater than 20,000 hertz.
  10. 18. a reflected sound wave
  11. 19. the material through which waves travel