Waves

4. is a system that uses sound waves to determine the location of objects or to communicate
5. a disturbance that transfers energy from one place to another
6. is the distance from any point on a wave to an identical point on the next wave
9. is a measure of how far the particles in the medium move away from their normal rest position
13. the most common unit used to express loudness
14. is a reflected sound wave
17. isthe use of echoes,or reflected waves to find objects
18. happens when two or more waves overlap and combine to form one wave
19. In this wave particles move perpendicularly to the direction the wave travels
20. the measurement for frequency

1. The particles of a medium vibrate in the same direction that the waves travels
2. The speed at which a wave travels
3. Is the time required for one cycle
7. Is a change in the observed frequency of a wave when the sound source,observer, or both are moving
8. how high or low you think a sound is
10. when a sound wave matches the natural frequency of an object and causes the object to vibrate
11. the material through witch a wave travels
12. is a measure of how well a sound can be heard
15. Is a longitudinal wave that is cased by vibrations and travels through a medium
16. are sound waves that have frequencies greater than 20,000 Hz