Across
- 1. measure of how well a sound can be heard
- 3. tells how many waves occur in an amount of time
- 5. happens when a sound wave matches a natural frequency of an object
- 9. the time required for one cycle of waves
- 10. sound waves that have frequencies greater than 20,000 hertz
- 11. uses of echoes to find objects
- 13. a disturbance in electric and magnetic fields
- 16. a measure of how far the particles in the medium move from their normal rest position
- 19. particles move perpendicularly to the direction the wave travels
- 20. distance from any point on a wave to an identical point on the next wave
Down
- 2. longitudinal wave that is caused by vibrations and travels through a medium
- 4. particles move back and forth in the same direction that the wave travels
- 6. a reflected sound wave
- 7. the speed at which a wave travels
- 8. a wave that requires a medium to travel
- 12. unit used to express loudness
- 14. the material through which a wave travels
- 15. how high or low you think a sound is
- 17. a disturbance that transfers energy from one place to another
- 18. what frequency is expressed in