The Collaborative International Dictionary of English v.0.48:

brouhaha \brouhaha\ n.
   1. the confused noise of many voices.

   Syn: hubbub, uproar.
        [WordNet 1.5]

   2. a confused disturbance far greater than its cause merits.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

brouhaha
    n 1: loud confused noise from many sources [syn: hubbub,
         uproar, brouhaha, katzenjammer]
    2: a confused disturbance far greater than its cause merits