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  • Sound has been defined as a series of disturbances in a matter that the human ear can detect. This definition can also be applied to disturbances that are beyond the range of human hearing.
  •   There are three elements that are necessary for the transmission and reception of sound. These are the source, a medium for carrying the sound, and the detector.
  •   Anything  which moves back and forth, or vibrates, and disturbs the medium around it may be considered a sound source.
  •  An example of the production and transmission of sound is the ring of a bell. When the bell is struck and begins to vibrate, the particles of the medium, or the surrounding air, in contact with the bell also vibrate.
  •  The vibrational disturbance is transmitted from one particle of the medium to the next, and the vibrations travel in a “wave” through the medium until they reach the ear.
  •  The eardrum, acting as a detector, is set in motion by the vibrating particles of air and the brain interprets the eardrum’s vibrations as the characteristic sound associated with a bell.

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