1) Bron: L. Picinali, A. Mancuso, G. Vercellesi 2009 - (LIMSI-CNRS, Orsay, France) / (DICO-LIM, Unimi, Milano, Italy).
2) Bron: 2008, trials conducted at University of Giessen, Germany
3) Bron: 2008, trials conducted internally at ReSound
4) Bron: 2009, T. Van den Bogært, E. Carette, J. Wouters, The Catholic University in Leuven, Belgium