Chapter 17

3. The bending of a wave as it enters a new medium at an angle
6. The unit of measure for frequency, equal to one cycle per second
8. A change in sound frequency caused by motion of the sound source, motion of the listener, or both
14. The interaction among two or more waves in which displacements combine to produce a wave with a smaller displacement
15. A longitudinal wave consisting of compressions and rarefactions, which travels through a medium
17. The interaction of two or more waves that combine in a region of overlap
20. The response of a standing wave to another wave of the same frequency, with dramatic increase in amplitude of the standing wave
21. An area of a longitudinal wave where the particles of the medium are close together
22. The maximum displacement of a medium from the rest position
24. A wave that travels along a surface separating two media
25. The distance between a point on a wave and the same point on the next cycle of the wave
26. The rate at which a wave's energy flows through a given unit of area
28. A point of maximum displacement midway between two nodes in a standing wave
30. Any motion that repeats at regular time intervals
31. The highest point of a transverse wave
32. The time required for one complete cycle of a periodic motion
33. The material through which a wave travels

1. A technique for determining the distance to an object under water
2. An area of a longitudinal wave where the particles of the medium are spread out
4. The abbreviation for hertz
5. A wave in which the vibration of the medium is parallel to the direction the wave travels.
7. A wave that causes a medium to vibrate at right angles to the direction in which the wave travels
9. The frequency of a sound as a listener perceives it
10. The interaction among two or more wave in which displacements combine to produce a wave with a larger displacement
11. The interaction that occurs when a wave bounces off a surface that it cannot pass through
12. A wave that appears to stay in one place and does not seem to move through a medium
13. A physical response to the intensity of sound, modified by physical factors
16. The bending of a wave as it moves around an obstacle or passes through a narrow opening
18. The lowest point of a transverse wave
19. A disturbance in matter that carries energy from one place to another
23. The number of complete cycles per unit time for a periodic motion
27. A point on a standing wave that has no displacement from the rest position
29. A unit that compares the intensities of different sounds