Across
- 4. defined in physics as velocity exceeding mach 5 which is 5 times the speed of sound
- 7. a physics phenomenon where a system oscillates with significantly higher amplitude when driven by an external force at its specific “natural frequency”
- 8. a dimensionless quantity in physics and fluid dynamics representing the radio of an object’s speed
- 10. effect the change in frequency or wavelength of a wave (sound or light) for an observer moving relative to the wave source
- 12. superposition the principle that when two or more waves traverse the same region, the resultant displacement at any point is the algebraic sum of the individual wave displacements
- 13. waves vibrational patterns formed by the interference of two identical waves traveling in opposite directions
- 14. vibration the oscillation of a system subjected to a continuous external, periodic driving force
- 16. the reduction of an item’s density or the decrease in pressure of a medium as a longitudinal wave passes through
- 18. refers to sound waves with frequencies below 20Hz which is below the lower limit of human hearing, which is inaudible to humans
- 20. a logarithmic unit used in physics to measure the radio of two sound intensities or powers, either B or I
- 21. interference a wave phenomenon where two or more waves with equal frequency and opposite phase (out of phase) meet, causing their crests to align with troughs
Down
- 1. sound waves or mechanical birations with frequencies higher than the upper audible limit of human hearing, defined as above 20,000 Hz (20 kHz)
- 2. the periodic fluctuation in sound loudness caused by the interference of two sound waves with slightly different frequencies
- 3. a wave or signal whose frequency is an integer (whole number) multiple of a fundamental frequency of a periodic wave or signal
- 5. frequency the frequency or rate that it vibrates naturally when disturbed
- 6. the reduction in volume or increase in density of a material caused by applying inward forces, acting to press its particles together
- 9. interference occurs when two or more coherent waves (identical in frequency and phase) meet at the same point with their crests and troughs aligning
- 11. interference the phenomenon where two or more waves superimpose (overlap) while traveling through the same medium, resulting in a new wave pattern
- 15. how high or low a sound is determined by the frequency of sound waves
- 17. a point along a standing wave where the wave has a minimum or zero amplitude resulting in no displacement from the equilibrium position
- 19. a point of maximum amplitude and displacement in a standing wave system, formed by constructive interference between two waves of the same frequency and amplitude traveling in opposit directions