modulate

Definitions

Aviation

Computing

  • verb to change a carrier wave so that it can carry data

Electronics

  • To modify a characteristic of a wave or signal proportionally to a characteristic present in another wave or signal.
  • To modify a characteristic of a carrier wave by an information-bearing signal, as occurs, for instance, in AM, FM, or PM.

Media Studies

  • verb to change the tone, pitch, or volume of sound, e.g. of a musical instrument or the human voice
http://www.dictionarycentral.com/definition/modulate.html