Crossword Physics Sound

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Across
  1. 1. effect an alteration in the observed frequency of a sound due to relative motion between the source and the observer
  2. 5. the term used to refer to the fundamental and its overtones
  3. 7. a disturbance of matter that is transmitted from its source outward by longitudinal waves
  4. 10. the lowest-frequency resonance
  5. 12. a low-pressure region in a sound wave
  6. 14. the perception of sound intensity
  7. 15. the reduction in amplitude over time as the energy of an oscillation dissipates
  8. 16. intensity level the level of sound relative to a fixed standard related to human hearing
  9. 18. to drive a system at its natural frequency
  10. 19. the perception of the frequency of a sound
Down
  1. 2. the phenomenon of driving a system with a frequency equal to the system's natural frequency
  2. 3. boom a constructive interference of sound created by an object moving faster than sound
  3. 4. frequency the frequency of the amplitude fluctuations of a wave
  4. 6. intensity the power per unit area carried by a sound wave
  5. 8. all resonant frequencies higher than the fundamental
  6. 9. a unit used to describe sound intensity levels
  7. 11. frequency the frequency at which a system would oscillate if there were no driving and no damping forces
  8. 13. the amount that matter is disrupted during a sound wave, as measured by the difference in height between the crests and troughs of the sound wave.
  9. 17. a phenomenon produced by the superposition of two waves with slightly different frequencies but the same amplitude
  10. 20. the perception of sound