noun (n)

• the sound made by the vibration of vocal folds modified by the resonance of the vocal tract(noun.communication)

  Example:
  The giraffe cannot make any vocalizations.
  

  Synonym:
  phonation, vocalisation, vocalism, voice, vox
  

  source: wordnet30
• the use of uttered sounds for auditory communication(noun.communication)

  Synonym:
  utterance
  

  source: wordnet30
• The act of vocalizing, or the state of being vocalized.(noun)

  source: webster1913