Sound

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 2. Either of the passages in the outer ___ from the auricle to the tympanic membrane (8)
  2. 4. Change in the apparent frequency of a wave as observer and source move toward or away from each (13)
  3. 6. A measuring instrument that sends out an acoustic pulse in water and measures distances in terms (5)
  4. 10. The particular auditory effect produced by a given cause (5)
  5. 11. Determining the location of something by measuring the time it takes for an echo to return from it (12)
  6. 13. A policy of ___ in the affairs of other countries (12)
  7. 15. A means or instrumentality for storing or communicating information (6)

Down

  1. 1. Having frequencies above those of audible sound (10)
  2. 3. Support consisting of metal loops into which rider's feet go (7)
  3. 5. Electronic equipment that provides visual images of varying electrical quantities (12)
  4. 6. A ___ that transmits ___ (9)
  5. 7. The number of occurrences within a given time period (9)
  6. 8. The magnitude of sound (8)
  7. 9. The repetition of a sound resulting from reflection of the sound waves (4)
  8. 12. A logarithmic unit of sound intensity (7)
  9. 14. The part of a gunlock that strikes the percussion cap when the trigger is pulled (6)