Visualizing Speech-Generated Oral Fluid Droplets
Aerosols and droplets generated during speech have been implicated in the person-to-person transmission of viruses.
This paper, frrely available on NEJM, reports the results of a laser light-scattering experiment in which
speech-generated droplets and their trajectories were visualized by means of a laser light.
You can also see a video here. A picture is worth a thousand words.