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