vocabulary

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Across
  1. 1. A measurement of speed compared to the speed of sound.
  2. 5. Frequency The frequency at which an object naturally vibrates.
  3. 9. When two sounds with different frequencies combine and create a pulsing sound.
  4. 10. Interference When waves cancel each other out.
  5. 12. Interference When two waves meet and combine.
  6. 13. Superposition When waves overlap and add together.
  7. 14. Sound waves with frequencies higher than humans can hear.
  8. 16. Extra frequencies that are multiples of the main frequency.
  9. 17. Interference When waves combine to make a bigger wave.
  10. 19. When an object vibrates strongly because it matches its natural frequency.
  11. 21. A unit used to measure how loud a sound is.
Down
  1. 2. Speeds greater than Mach 5.
  2. 3. The part of a wave where particles are close together.
  3. 4. Vibration When an object vibrates because something else makes it vibrate.
  4. 6. The part of a wave where particles are spread apart.
  5. 7. Effect A change in sound caused by motion (like a passing siren 🚑).
  6. 8. Wave A wave that appears to stay in one place.
  7. 11. Sound waves with frequencies lower than humans can hear.
  8. 15. A point where there is maximum movement in a wave.
  9. 18. How high or low a sound is.
  10. 20. A point where there is no movement in a wave.