Sound Waves

2. the SI unit of sound
6. wave particles move back and fourth in the same direction that a wave travels
9. the distance from any point on wave to an identical point on the next wave
11. wave a disturbance in electric magnetic fields
12. the most common unit used to express loudness
13. measure of how well a sound can be heard
14. a system that uses sound waves to determine the location of objects or to communicate
16. the use of echoes, or reflected sound waves to find objects
19. a measure of how far the particles in the move away from their normal rest position
20. a reflected sound wave

1. a wave tells how many cycles occur in an amount of time
3. wave particles that move perpendicularly to the direction the wave travels
4. wave a wave that requires a medium through which to travel
5. disturbance that transfers energy from one place to another
7. when two or more waves overlap and combine to form one wave
8. sound waves that have frequencies greater than 20,000 Hz
10. the material through which a wave travels
15. how high or low you think a sound is
17. Effect a change in the observed frequency of a wave when the sound source, the observer, or both are moving
18. wave a longitude wave that is caused by vibrations and travels through a medium