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Across 1. quieting a sound 7. the strength of a wave 8. when a wave bounces off an object 9. controller of pitch of the wave 10. energy that spreads out as it goes 14. wave WITH compressions and rarefractions 15. two sound waves with destructive and constructive interferences 16. Measurement from crest to crest 17. the amount of strength a wave has 18. makes a wave's frequency decrease

Down 2. controller of volume of the wave 3. a connection of waves 4. when two waves collide 5. speed of waves 6. Sound wave WITHOUT compressions and rarefractions 11. "thin" part of a longitudinal wave 12. "note" of the wave 13. the opposite of nodes