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A schlieren optical study of the human cough with and …
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2843945/
- (b) Schlieren image of a cough directed downward by a 25-year-old male subject, revealing the character of the cough as a turbulent jet of air. Given a peak velocity of 13 m s −1 ( Khan et al . 2004 ) and an effective initial diameter of roughly 2 cm, the Reynolds number of the human cough is perhaps 18 000, more than high enough to ensure ...
Visualizing Coughs, the Schlieren Way - Optics and …
- https://www.optica-opn.org/home/newsroom/2020/august/visualizing_coughs_the_schlieren_way/
- Lamp, mirror, razor blade, camera. Originally invented in 1864, schlieren photography is a workhorse in aeronautical engineering—where it is used to image airflows in wind tunnels, for example—as well as in a variety of other niche areas such as detection of drugs and explosives. The technique works by detecting variations in the refractive ...
A schlieren optical study of the human cough with and …
- https://pubmed.ncbi.nlm.nih.gov/19815575/
- Further, a high-speed schlieren video of a single cough is analysed by a computerized method of tracking individual turbulent eddies, demonstrating the non-intrusive velocimetry of the expelled airflow. Results show that human coughing projects a rapid turbulent jet into the surrounding air, but that wearing a surgical or N95 mask thwarts this ...
A schlieren optical study of the human cough with and …
- https://royalsocietypublishing.org/doi/10.1098/rsif.2009.0295.focus
- Further, a high-speed schlieren video of a single cough is analysed by a computerized method of tracking individual turbulent eddies, demonstrating the non-intrusive velocimetry of the expelled airflow. ... 1979 Schlieren photography: a tool for speech research. Acoust. Lett. 3, 73–75. Google Scholar. Edge B. A., Paterson E. G.& Settles G. S..
Schlieren Image Of Cough Photograph by Gary S. Settles
- https://pixels.com/featured/schlieren-image-of-cough-gary-s-settles.html
- Schlieren Image Of Cough is a photograph by Gary S. Settles which was uploaded on July 7th, 2014. The photograph may be purchased as wall art, home decor, apparel, phone cases, greeting cards, and more. All products are produced on-demand and shipped worldwide within 2 - …
Coughing and Aerosols: Sequential Schlieren Images of a …
- https://www.youtube.com/watch?v=acbiyHcsAWI
- Sequential schlieren images during the cough were recorded at 3000 frames per second. A maximum airspeed of 8 m per second (18 mph) was observed, averaged du...
The Mysterious Cough, Caught on Film - The New York …
- https://www.nytimes.com/2008/10/28/science/28cough.html
- The image, published online Oct. 9 by The New England Journal of Medicine, was created by schlieren photography, which “takes an invisible phenomenon and turns it …
Schlieren Photography - John Loomis
- https://johnloomis.org/eop513/notes/schlieren/index.html
- Schlieren Photography. Schlieren Photography (Wikipedia) . Shadowgraph (Wikipedia) . The Mysterious Cough, Caught on Film (New York Times) . Acoustic Field Characterization with Schlieren System (pdf slide presentation) Video. Maintained by John Loomis, last updated 17 December 2009 John Loomis, last updated 17 December 2009
Visualization of air spread when coughing 😷 - YouTube
- https://www.youtube.com/watch?v=MX8InIv0sXs
- This video demonstrate how differently the air spreads when coughing. This visualizes the high importance of the World Health Organization's behavioral recom...
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