A multi-dimension feature vector consisted of amplitude envelope, formant, vocal tract length, average firing rate of auditory nerves is chosen as the mainly cue for whispered tone.

• 根据耳语音发音特点，以听神经平均发放率、幅值包络、共振峰、声道长度等构成的多维矢量描述声调特征，采用蚁群聚类算法将多维特征矢量聚类后，送入局部有监督特征映射神经网络进行声调识别。