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肺音作为一种复合的生物信号,可借助于计算机信息处理技术作定量分析。肺音有两种主要成分,其一为气流通过气道的呼吸音;其二为肺部疾病时出现的附加音如捻发音、哮鸣音。前者音频范围较窄(<600Hz),后者音频较宽(200～2000Hz)。本文报告对低频肺音的研究,研究对象分3组:①有捻发音的石棉肺病人;②有捻发音的心源性肺水肿病人;③不吸烟的正常人(对照组)。每组5人,皆为男性。检查时病人取坐位,声音接纳器贴右后胸壁第9肋间,记录15个呼吸周期。对记录的分析集中于吸气相后段的肺音,时间约相当于吸气时间长度的0.6～1.4秒。资料输送到PDP 11/45计算机中贮存。
Pulmonary tone, as a complex biological signal, can be quantitatively analyzed by means of computerized information processing techniques. There are two main components of lung sound, one of which is the respiratory sound of the air stream passing through the airway; the other is the additional sound of the pulmonary disease, such as twisting and wheezing. The former is narrower (<600Hz) and the latter is wider (200 ~ 2000Hz). This paper reports the study of low-frequency pulmonary sound, the research object is divided into three groups: ① asbestosis patients with twisting sound; ② patients with heart-phonic pulmonary edema; ③ non-smoking normal people (control group). Each group of 5 people, all men. Check the patient take the seat, the sound receiver attached to the right chest wall 9th intercostal space, record 15 respiratory cycles. The analysis of the records focused on the lung tone of the inspiratory phase, which was approximately 0.6 to 1.4 seconds approximately the length of the inspiratory time. Data is transferred to the PDP 11/45 computer for storage.