Please ensure Javascript is enabled for purposes of website accessibility
Here's Why It's Crazy to Go Outside Without a Mask
TLBBHMAP3-U010ALB5ANM-348f959abae2-512-300x300-1
By Jim Jakobs, Digital Producer
Published 4 years ago on
May 7, 2020

Share

Talking emits droplets from your mouth. Loud talking generates even more droplets. These droplets can harbor infectious virus particles.

The National Institutes of Health published a letter with video and visual accompaniment Wednesday to prove a noticeable point.

The scientists write, “The act of speaking generates oral fluid droplets that vary widely in size, and these droplets can harbor infectious virus particles.”

In other words, when you talk, you can infect others around you.

Laser Light-Scattering Experiment

In the NIH experiment, droplets produced flashes as they passed through a light sheet.

An iPhone 11 Pro video camera aimed at the light sheet through a hole (7 cm in diameter) on the opposite side of a box recorded sound and video of the light-scattering events at a rate of 60 frames per second.

The size of the droplets was estimated from ultrahigh-resolution recordings. Video clips of the events while the person was speaking, with and without a face mask, show a stark difference.

Scientists had a person say  “stay healthy” at different levels. The lower level produced fewer droplets as opposed to when the person spoke the words much louder.

(NIH)

Watch the Video

You can watch a video of the experiment at this link.

Slightly Damp Washcloth Placed Over Mouth

When the same phrase was uttered three times through a slightly damp washcloth over the speaker’s mouth, the flash count remained close to the background level showing a significant decrease in droplets.

“Some studies have shown that the number of droplets produced by speaking is similar to the number produced by coughing,” said the letter writers.  “Our aim was to provide visual evidence of speech-generated droplets and to qualitatively describe the effect of a damp cloth cover over the mouth to curb the emission of droplets.”

In other words, covering up your mouth, even with just a damp washcloth, cuts down on the possibility you could infect a person next to you.

The authors of the letter were Philip Anfinrud, Ph.D., Valentyn Stadnytskyi, Ph.D., and Adriaan Bax, Ph.D., with the National Institutes of Health, Bethesda, Maryland; and Christina E. Bax, B.A., Perelman School of Medicine at the University of Pennsylvania, Philadelphia.

 

DON'T MISS

A Fresno Edition of Monopoly? That’s Capitalism at Work, Baby!

DON'T MISS

California Officials Sue Huntington Beach Over Voter ID Law Passed at Polls

DON'T MISS

Indiana Fever Receives No. 1 Overall Draft Pick Caitlin Clark

DON'T MISS

Which Fresno Restaurants Are Best? The Pros Picked These Places.

DON'T MISS

Trump’s Historic Hush-Money Trial Gets Underway; 1st Day Ends Without Any Jurors Being Picked

DON'T MISS

Fresno-Madera United Way Launches National Search for New CEO

DON'T MISS

Justice Thomas Misses Supreme Court Session Monday With No Explanation

DON'T MISS

‘Civil War’ Declares Victory at the Box Office, Toppling ‘Godzilla X Kong’

DON'T MISS

Why Tortillas Sold in California May Be Forced to Add a New Ingredient

DON'T MISS

Costco Tries Again at City Council for Big NW Fresno Move

UP NEXT

California Officials Sue Huntington Beach Over Voter ID Law Passed at Polls

UP NEXT

Indiana Fever Receives No. 1 Overall Draft Pick Caitlin Clark

UP NEXT

Which Fresno Restaurants Are Best? The Pros Picked These Places.

UP NEXT

Fresno-Madera United Way Launches National Search for New CEO

UP NEXT

Justice Thomas Misses Supreme Court Session Monday With No Explanation

UP NEXT

‘Civil War’ Declares Victory at the Box Office, Toppling ‘Godzilla X Kong’

UP NEXT

Why Tortillas Sold in California May Be Forced to Add a New Ingredient

UP NEXT

Costco Tries Again at City Council for Big NW Fresno Move

UP NEXT

Scheffler Turns the Masters Into Another Sunday Yawner With a Dominating Win

UP NEXT

Ethiopia’s Lemma Wins, Fresno’s Albertson 7th in Boston Marathon. Kenya’s Obiri Retains Women Title.

Which Fresno Restaurants Are Best? The Pros Picked These Places.

15 hours ago

Trump’s Historic Hush-Money Trial Gets Underway; 1st Day Ends Without Any Jurors Being Picked

15 hours ago

Fresno-Madera United Way Launches National Search for New CEO

Local /

16 hours ago

Justice Thomas Misses Supreme Court Session Monday With No Explanation

17 hours ago

‘Civil War’ Declares Victory at the Box Office, Toppling ‘Godzilla X Kong’

17 hours ago

Why Tortillas Sold in California May Be Forced to Add a New Ingredient

17 hours ago

Costco Tries Again at City Council for Big NW Fresno Move

18 hours ago

Scheffler Turns the Masters Into Another Sunday Yawner With a Dominating Win

19 hours ago

Ethiopia’s Lemma Wins, Fresno’s Albertson 7th in Boston Marathon. Kenya’s Obiri Retains Women Title.

19 hours ago

Vegas, US Tour and More Signings: Wrexham Has Plenty of Fun and Work Ahead After Latest Promotion

19 hours ago

A Fresno Edition of Monopoly? That’s Capitalism at Work, Baby!

Alright, cats and kittens, straphang onto your beanies because I’m about to lay a news flash on you that’s so whimsically wild it coul...

14 hours ago

Fresno Monopoly Edition
14 hours ago

A Fresno Edition of Monopoly? That’s Capitalism at Work, Baby!

14 hours ago

California Officials Sue Huntington Beach Over Voter ID Law Passed at Polls

14 hours ago

Indiana Fever Receives No. 1 Overall Draft Pick Caitlin Clark

15 hours ago

Which Fresno Restaurants Are Best? The Pros Picked These Places.

15 hours ago

Trump’s Historic Hush-Money Trial Gets Underway; 1st Day Ends Without Any Jurors Being Picked

Local /
16 hours ago

Fresno-Madera United Way Launches National Search for New CEO

17 hours ago

Justice Thomas Misses Supreme Court Session Monday With No Explanation

17 hours ago

‘Civil War’ Declares Victory at the Box Office, Toppling ‘Godzilla X Kong’

MENU

CONNECT WITH US

Search

Send this to a friend