Structures and Acoustics

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Across
  1. 4. The number of waves to pass a specific point per second
  2. 7. A horizontal structure supported on one side
  3. 10. Walls designed to spread a load over its entire surface
  4. 11. One of four basic qualities of sound waves
  5. 13. Term used for wood columns made from single tree trunk
  6. 15. The prolongation of sound as it repeatedly bounces off hard surfaces
  7. 18. Triangular or rectilinear spanning opening
  8. 19. One out of five components of a building structural system
  9. 20. Vertical structural member, longer than wide/deep
Down
  1. 1. Single number rating system of how well a material absorbs sound
  2. 2. A curved structure to span an opening
  3. 3. A building's vertical expansion above ground
  4. 5. Ability to block sound from one space to another
  5. 6. One of the materials o a wall that is used to block sound transmission
  6. 8. Support floor & anchors rest of the building
  7. 9. Number system to rate a ceiling's efficiency as a barrier to sound intrusion between two closed rooms
  8. 12. A quality of acoustic energy
  9. 14. A linear horizontal structural member placed over a door or window
  10. 16. The reaction of a material
  11. 17. Element of spanning openings