SCIENCE

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Across
  1. 2. The distance over which the wave's shape repeats
  2. 6. Three small bones in the middle ear.
  3. 9. A wave in which the medium vibrates at right angles to the direction of its propagation.
  4. 10. Canal: The tubular passage of the outer ear leading to the tympanic membrane
  5. 11. The reinforcement or prolongation of sound by reflection from a surface or by the synchronous vibration of a neighbouring object.
  6. 13. An area with no particles of matter.
  7. 14. Movement of energy or waves
  8. 16. An area of high pressure in which the particles are close together
  9. 18. Membrane: a membrane forming part of the organ of hearing, which vibrates in response to sound waves. In humans and other higher vertebrates, it forms the eardrum, between the outer and middle ear.
  10. 19. Where the sound wave starts
  11. 22. A form of wave energy
  12. 23. The unit of Frequency
  13. 27. A substance that energy or waves move in (Air, Water, Wood)
  14. 28. A wave vibrating in the direction of propagation
  15. 29. A movement back and forth in a regular rhythm
  16. 30. Unit of sound volume
  17. 32. The number of times a wave occurs in one second
  18. 37. Effect: An increase (or decrease) in the frequency of a sound wave as the source and observer move towards (or away from) each other.
  19. 38. Inner most ear ossicle (tiny bone)
  20. 39. Middle ear ossicle (tiny bone)
Down
  1. 1. The location of objects by reflected sound, in particular that used by animals such as dolphins and bats.
  2. 3. Acoustic absorption refers to the process by which a material, structure, or object takes in sound energy when sound waves are encountered, as opposed to reflecting the energy.
  3. 4. The throwing back by a body or surface of light, heat, or sound without absorbing it.
  4. 5. The way in which waves travel
  5. 7. A loud explosive noise caused by the shock wave from an aircraft or other object travelling faster than the speed of sound
  6. 8. Outer most ear ossicle (tiny bone)
  7. 12. A coiled spring
  8. 15. The external part of the ear in humans and other mammals
  9. 17. The length of time a sound can be heard
  10. 20. An area of low pressure in which the particles are far apart
  11. 21. A mechanical phenomenon where oscillations occur about a point
  12. 24. Window: An oval opening between the middle ear and the vestibule
  13. 25. Canals: three fluid-filled bony channels in the inner ear. They are situated at right angles to each other and provide information about orientation to the brain to help maintain balance.
  14. 26. The density of a substance is its mass per unit volume
  15. 31. A high-vacuum tube in which cathode rays produce a luminous image on a fluorescent screen, used in televisions and computer terminals
  16. 33. A sound or sounds caused by the reflection of sound waves from a surface back to the listener
  17. 34. The spiral cavity of the inner ear which produces nerve impulses in response to sound vibrations.
  18. 35. A device for viewing oscillations by a display on the screen of a cathode ray tub
  19. 36. If the notes of a chord are broken up and played from low to high or high to low, the chord becomes an arpeggio