Sound Vocabulary

3. When an object is made to vibrate by another vibrating object nearby.
5. When waves meet and cancel each other out, creating a smaller amplitude.
9. A large increase in amplitude that occurs when an object is vibrated at its natural frequency.
12. A ratio of the speed of an object to the speed of sound in air.
16. When waves meet and add together to create a larger amplitude.
17. A unit for measuring the intensity or loudness of sound.
19. The frequency at which an object tends to vibrate when it is disturbed
20. The principle that the total vibration at any point is the sum of the vibrations from each individual wave.

1. The region in a sound wave where particles are closest together.
2. The region in a sound wave where particles are spread apart.
4. A variation in sound intensity caused by the interference of two sounds with slightly different frequencies.
6. Sound waves with frequencies below the range of human hearing (below 20 Hz).
7. Sound waves with frequencies above the range of human hearing (above 20,000 Hz).
8. The change in frequency or pitch of a sound due to the motion of the source or observer.
10. When two or more waves overlap and combine to form a new wave pattern.
11. Speeds that are much greater than the speed of sound, typically Mach 5 or higher.
13. A point on a standing wave where the amplitude is greatest.
14. A point on a standing wave where there is no movement.
15. How high or low a sound seems, determined by its frequeny
18. Whole number multiples of a fundamental frequency, producing overtones.
21. A wave that appears to stay in one place, with nodes and antinodes, usually formed by the interference of two traveling waves.