Sound waves

2. points of maximum amplitude or displacement on a standing wave, occurring halfway between nodes
6. Does not appear to travel, produced when two identical waves interact as they travel in opposite directions
7. oscillating system responds with maximum Amplitude to an external force that matches its natural frequency
8. the oscillation of a system under the influence of an external periodic force
11. the change in frequency caused by either the source of the waves moving, the observer moving, or both a different velocities
12. the study and application of high frequency sound waves
14. the ratio of an objects speed to the speed of sound
15. a phenomenon that occurs when a wave changes direction as a result of a change in wave speed at different points along a wave front
16. the reduction in volume or size of a material caused by balanced, inward forces
17. a wave with a frequency that is a positive integer multiple of the fundamental frequency
18. transducer emits high frequency sound waves
20. unit used to measure sound, power, or pressure

1. the superposition of in phase waves that produce a resultant wave
3. inherent rate at which a system tends to oscillate or vibrate when disturbed, without external force
4. a point, line, or region along a standing wave where the displacement is zero
5. a pulsating sound produced when two sound waves with different frequencies interact
9. sound waves with frequencies below 20 HZ
10. the subjective perceptual quality of sound
11. the superposition of two waves that are out of phase with each other in such a wave as to produce a smaller wave or cancelling out each other entirely
13. superposition a process in which the positions of colliding waves are added at each point in time to determine the resultant wave
19. Interference the phenomenon that occurs when two waves superimpose as they meet while traveling in the same medium