Murata A, Taniguchi Y, Hashimoto Y, Kaneko Y, Takasaki Y, Kudoh S
Fourth Department of Internal Medicine, Nippon Medical School, Tokyo.
Intern Med. 1998 Sep;37(9):732-5. doi: 10.2169/internalmedicine.37.732.
There are two types of coughs, productive and non-productive; the former is caused by excess airway secretions. The analysis of cough may provide important clues not only to aid diagnosis, but also for the selection of drugs for treatment. In this study, cough sounds recorded in a free acoustic field from patients with productive cough and non-productive cough due to chronic airway diseases were compared with those of voluntary cough of healthy subjects and were analyzed by sound spectrogram and time-expanded waveform. All cough sounds could be separated into two or three phases. The implementation of the novel technique to record cough sounds in the free acoustic field and to analyze the sounds of the high frequency range enable recognition of the characteristics of the cough sounds in phase 2 of the cough.
咳嗽有两种类型，即有痰咳嗽和无痰咳嗽；前者由气道分泌物过多引起。咳嗽分析不仅可为辅助诊断提供重要线索，还可为治疗药物的选择提供依据。在本研究中，将慢性气道疾病导致的有痰咳嗽和无痰咳嗽患者在自由声场中记录的咳嗽声音与健康受试者的自主咳嗽声音进行比较，并通过声谱图和时间扩展波形进行分析。所有咳嗽声音均可分为两到三个阶段。在自由声场中记录咳嗽声音并分析高频范围声音的新技术的应用，能够识别咳嗽第二阶段咳嗽声音的特征。
