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Across 1. how low or high a sound seems to be 4. waves are used in medicine to diagnose monitor and treat many condtitons 9. the type of matter whether liquid, solid, or gas that sound waves travel through 15. the ability of a medium to vibrate by absorbing energy at it's own natural frequency 17. a pushing vibration in loudness 19. the main tone played and heard 20. the amount of energy that flows through a certian area in a specific amount of time

Down 2. sounds that are deliberately used in a regular pattern 3. human perception of sound intensity 5. frequency at which the material viberates 6. air vibration in a resonator or hollow chamber that amplifes sounds with the pitch determined by the length of the viberating tube of air 7. instruments in which sound is produced by plucking, stricking, or drawing a bow across tightly strached strings 8. vibration with a frequency that is multiple of the fundamental frequency 10. devices used to make musical sounds 11. change in pitch or wave frequency due to a moving either the source of the wave or the observer can be moving 12. a system that uses the reflections of underwater sound waves to locate objects 13. the differances among sounds of the same pitch and loudness 14. process of locating objects by sending out sounds and interperting the waves reflected back. 16. study of sound which can prvent excessive reverberation and create good listening environments 18. formed when a vibrating object collides with air molecules transferring energy to them