noun (n)

• the rapid series of noises made by the parts of a machine(noun.event)

  Synonym:
  chatter
  

  source: wordnet30
• the high-pitched continuing noise made by animals (birds or monkeys)(noun.event)

  source: wordnet30
• The act or habit of talking idly or rapidly, or of making inarticulate sounds; the sounds so made; noise made by the collision of the teeth; chatter.(noun)

  source: webster1913