以28名临床未扪及颞颌关节杂音的人群为对照组,28名有关节杂音的患者为实验组,两组均无其他关节症状,用下颌运动记录仪(Sirognathograph)及相应计算机记录下颌运动,接触式麦克风记录关节杂音,通过比较两组间张口速度、闭口速度、张口运动的上下向位移(张口度)、前后向位移及左右向位移(张 Twenty-eight non-palpable temporomandibular joint murmurs were used as control group. Twenty-eight patients with joint murmur were selected as experimental group. There was no other joint symptoms in both groups. The mandibular motion was recorded by using a computer with a mandibular movement recorder , Contact microphone recorded joint noise, by comparing the two groups mouth speed, mouth speed, mouth movements up and down movement (mouth opening degree), before and after the displacement and left and right displacement