Sound & Noise Pollution

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Across
  1. 2. Quick back-and-forth movement that produces sound.
  2. 8. Unwantedor unpleasant sound.
  3. 9. The distance a vibrating object moves.
  4. 10. Hard surfaces send sound back; they ______ it.
  5. 12. How high or low a sound is.
  6. 13. Whatsound needs in order to travel
  7. 15. Material that reduces sound energy.
Down
  1. 1. Unit used to measure loudness.
  2. 3. The strength or loudness of a sound.
  3. 4. Vibrations that are organized can make this.
  4. 5. Noisethat is harmful to health.
  5. 6. Soft surfaces soak up sound; they ______ it.
  6. 7. Empty space where sound cannot travel.
  7. 11. When sound waves bounce back.
  8. 14. Statematter through which we usually hear sound.
  9. 16. Problems caused by loud sound can include hearing _____.