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Across 4. sounds with frequencies lower than 20hz 5. depends on the frequeny of the sound. 11. the length from one crest/trough to another 12. number of waves that pass a certain point in a given amount of time. 13. blending pitches to produced sound 16. the greatest distance from the resting position of a wave. 19. lowest frequency and pitch 21. higher frequencies and pitch 24. high-frequency ultra-sonic waves 25. high point of a wave

Down 1. determines the loudness or softness of a sound 2. no pleasing quality 3. change in sound or light that occurs wherever there is motion between the source and it's observer 6. shaped like a snail shell 7. traveling disturbance that carries energy from one place to another. 8. sounds with more than 20,000hz 9. determined by the tempurature, elasticity, and density of the medium. 10. frequency of a wave times wave length 14. variation in particular, in the amplitude or frequency of an electromagnetic wave 15. pleasing quality 17. liquid filled portion of the ear; recieves vibrations from the middle ear 18. has three small bones the hammer the anvil and the stirrup 20. material that the mechanical waves travel through. 22. low point of a wave 23. produced by vibrations that travel through longitudinal waves.