Across
- 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
Down
- 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