Noise Pollution Crossword

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Across
  1. 3. form of measuring sound
  2. 4. a device for finding sources of sound underwater
  3. 6. to find things by finding the time for an echo to return and the direction from which it returns
  4. 7. a measure of the rate of decrease in the intensity of electromagnetic radiation as it passes through a given substance
  5. 8. a compound substance
  6. 10. the transmission of acoustic energy through a medium
  7. 11. allowing water to pass through
  8. 13. aspects of a stimulus; what are perceived after a stimulus
  9. 14. relating to sound
  10. 15. a cluster of soil particles
Down
  1. 1. inorganic, typically ceramic, alumino-silicate forming long-range, covalently bonded, non-crystalline networks
  2. 2. a dampening of sound
  3. 5. make softer
  4. 9. percentage of void space in a solid
  5. 12. a polymer with elastic properties