The whispered speech has some characteristics different from normal speech, such as no vocal cords vibration, pitch disappearing and lower speech energy than that of the phonated speech. The special voicing style of whispery decreases the speech intelligibility and the speech quality. 其具有声带不振动、基频缺失和声音能量低的特性,这些特性降低了耳语音的可懂度和清晰度。