论文标题
在物理疏远建议的背景下，语音气溶胶的分散
Dispersion of speech aerosols in the context of physical distancing recommendations
论文作者
论文摘要
高速粒子图像速度计（PIV）用于量化人类受试者在不同声音强度水平下的语音发声过程中产生的气溶胶气云的分散体。测得的PIV数据用于量化初始穿透深度。使用经典的脉冲级缩放法定律传播距离计算了超出测量持续时间的时间段。我们的结果表明，渗透距离在响亮强度语音（例如在唱歌，教室讲座，聚会等）和中等强度咳嗽之间是可比的。基于理论上的气溶胶繁殖距离和时间，6英尺的物理距离建议可能足以避免通过气溶胶云的初始穿透偶然暴露，但不足以长时间暴露以减慢慢速繁殖气溶胶云。
High-speed particle image velocimetry (PIV) was used to quantify the dispersion of aerosol-laden gas clouds generated during phonetic vocalization by a human subject at different sound intensity levels. The measured PIV data was used to quantify the initial penetration depth. Using classical pulsed jet scaling laws propagation distances were computed for time periods beyond the measured duration. Our results indicate that the penetration distance was comparable between loud intensity speech (for example during singing, classroom lectures, parties etc.) and moderate intensity cough. Based on theoretical aerosol propagation distance and time, the 6 feet physical distancing recommendations are likely sufficient to avoid incidental exposure by the initial penetration of the aerosol cloud, but insufficient for prolonged exposure to slow propagating aerosol clouds.
