Subway IAQ Research Corps., Korea Railroad Research Institute, Gyeonggi-do, South Korea.
Chemosphere. 2012 Jun;87(11):1260-4. doi: 10.1016/j.chemosphere.2012.01.032. Epub 2012 Feb 18.
Increasing concerns about the spread of airborne pathogens such as severe acute respiratory syndrome (SARS) and novel swine-origin influenza A (H1N1) have attracted public attention to bioaerosols and protection against them. The airborne pathogens are likely to be expelled from coughing or speaking, so the physical data of the exhaled particles plays a key role in analyzing the pathway of airborne viruses. The objective of this study was to analyze the initial velocity and the angle of the exhaled airflow from coughing and speaking of 17 males and 9 females using Particle Image Velocimetry (PIV) and acrylic indoor chamber. The results showed that the average initial coughing velocity was 15.3 m/s for the males and 10.6 m/s for the females, while the average initial speaking velocity was 4.07 m/s and 2.31 m/s respectively. The angle of the exhaled air from coughing was around 38° for the males and 32° for the females, while that of the exhaled air from speaking was around 49° and 78° respectively. Also, the linear relation between the tested subject's height and their coughing and speaking velocity was shown in this study.
人们对严重急性呼吸系统综合征（SARS）和新型猪源甲型 H1N1 流感等空气传播病原体传播的担忧日益增加，这引起了公众对生物气溶胶及其防护的关注。空气传播病原体很可能是通过咳嗽或说话排出的，因此呼出颗粒的物理数据在分析空气传播病毒的途径方面起着关键作用。本研究的目的是使用粒子图像测速法（PIV）和丙烯酸室内室分析 17 名男性和 9 名女性咳嗽和说话时呼出气流的初始速度和角度。结果表明，男性平均初始咳嗽速度为 15.3m/s，女性为 10.6m/s；而平均初始说话速度分别为 4.07m/s 和 2.31m/s。男性咳嗽时呼出空气的角度约为 38°，女性约为 32°；而说话时呼出空气的角度约为 49°和 78°。此外，本研究还显示了被测对象的身高与咳嗽和说话速度之间的线性关系。
