Sound Waves and Hearing

2. a disturbance that transfers energy from one place to another.
4. is a measure of how well a sound can be heard.
6. is a measure of how far the particles in the medium away from their normal rest position.
13. how high or low you think a sound is.
15. wave is a disturbance in electric and magnetic fields.
16. wave is a longitudinal wave that is caused by vibrations and travels through a medium.
17. is the distance from any point on a wave to an identical point on the next wave.

1. happens when a sound wave matches the natural frequency of an object and causes the object to vibrate.
3. the most common unit used to express loudness.
5. effect is a change in the observed frequency of a wave when the sound source, the observer, or both are moving.
7. wave particles move back and forth in the same direction that the wave travels, or parallel to the wave.
8. happens when two or more waves overlap and combine to form one wave.
9. wave particles move perpendicularly to the direction the wave travels.
10. of a wave tells how many cycles occur in an amount of time, usually 1 s.
11. is the material through which a wave travels.
12. wave a wave that requires a medium through which to travel.
14. frequency is expressed in this.
18. is a reflected sound wave.