JohnPaul Vocabulary Crossword

3. oscillation of a system, such as a structure or mechanical component, driven by a continuous external, time-varying periodic force
5. two or more waves of similar frequency and amplitude meet while out of phase causing their crests and troughs to cancel
11. logarithmic unit used to express the ratio of two power of intensity values
12. sound waves with frequencies higher than the upper audible limit of human hearing
13. flight exceeding mach 5-5 times the speed of sound
14. reduction in volume or increase in density of a material caused by applying inward pushing forces
16. periodic rhythmic fluctuations in loudness heard when two sound waves of slightly different frequencies interfere with each other
17. a wave pattern formed by the interference of two waves with the same frequency and amplitude traveling in opposite directions
19. the reduction of density and pressure in a medium
20. the change in frequency or pitch of a wave (sound or light) perceived by an observer when the wave source and the observer are moving relative to each other

1. a point along a standing wave where the wave has minimum or zero amplitude
2. dimensionless quantity representing the ratio of an object's speed
4. sound waves with frequencies below 20Hz
6. where two or more waves of the same frequency and phase superimpose
7. when two or more waves traverse the same space
8. resonant frequencies of a vibrating system that are integer (whole-number) multiples of the lowest resonant frequency, known as the fundamental frequency
9. the subjective perception of sound frequency determining how high or low a tone sounds to a listener
10. phenomenon where a system oscillates with significantly higher amplitude when driven by an external periodic force at its natural frequency
15. the position of maximum displacement in a standing wave system.
18. where two or more coherent waves superpose (overlap) to form a resultant wave with a greater, lower, or same amplitude