Researchers have created tests to determine which mask is the least effective

Therefore, a group of researchers at Duke University have developed a simple method to analyze the effectiveness of different types of masks, which are key factors in stopping the spread of the virus.

The quest began when a professor at Duke’s School of Medicine was helping a local group buy bulk masks and distribute them to community members in need. The professor wanted to make sure the group actually bought an effective mask.

“We use black boxes, lasers, and cameras,” Martin Fisher, one of the authors of the study, told CNN. “The laser beam is vertically expanded to form a thin sheet of light that illuminates through the left and right slits of the box.”

In front of the box is a hole through which the speaker can speak. A cell phone camera is placed on the back of the box to record the light scattered in all directions by the respiratory droplets that pass through the laser beam as it speaks.

Then a simple computer algorithm counts the droplets that appear in the video.

Encourage the use of effective masks

Public health professionals have spent many months highlighting that masks are one of the most effective tools to help fight a pandemic. Many US states now have some mask requirements in place.

But when I tested its effectiveness, I found that some masks were literally useless.

Researchers have tested 14 commonly available masks, including the professional N95 masks, which are usually reserved for healthcare professionals. Initially, the test was done by the speaker speaking without wearing a mask. Then they did it again while the speaker was wearing a mask. Each mask was tested 10 times.

The most effective mask was the fitted N95. The three-layer surgical masks and cotton masks that many people made at home also performed well.

Also called a gate mask, the neck fleece that runners often use has the least effect. In fact, wearing a fleece mask produced a higher number of respiratory droplets. This is because the substance breaks down large droplets into smaller particles that are easier to carry by air.

Folded bandanas and knit masks also had poor performance and were not very protective.

“We were very surprised to find that the number of particles measured in the fleece actually exceeded the number of particles measured without wearing a mask,” Fischer said. “We want to emphasize that we really encourage people to wear masks, but we want them to work.”

The test setup is very simple, but all you need is a box, a laser for less than $200, a lens, and a cell phone camera. Fisher does not recommend setting up at home.

Mishandling of a strong laser can cause permanent eye damage unless a person is familiar with the safety of lasers or has optical experience. However, researchers want companies, museums, and community outreach centers to set up tests to show people which masks are most effective.

“This is a very powerful visual tool to help realize that very simple masks like these homemade cotton masks are really effective in stopping most of these respiratory splashes. “Fisher said. “Companies and manufacturers can set it up and test the mask design before they are manufactured. This is also very handy.”

..

What Are The Main Benefits Of Comparing Car Insurance Quotes Online

LOS ANGELES, CA / ACCESSWIRE / June 24, 2020, / Compare-autoinsurance.Org has launched a new blog post that presents the main benefits of comparing multiple car insurance quotes. For more info and free online quotes, please visit https://compare-autoinsurance.Org/the-advantages-of-comparing-prices-with-car-insurance-quotes-online/ The modern society has numerous technological advantages. One important advantage is the speed at which information is sent and received. With the help of the internet, the shopping habits of many persons have drastically changed. The car insurance industry hasn't remained untouched by these changes. On the internet, drivers can compare insurance prices and find out which sellers have the best offers. View photos The advantages of comparing online car insurance quotes are the following: Online quotes can be obtained from anywhere and at any time. Unlike physical insurance agencies, websites don't have a specific schedule and they are available at any time. Drivers that have busy working schedules, can compare quotes from anywhere and at any time, even at midnight. Multiple choices. Almost all insurance providers, no matter if they are well-known brands or just local insurers, have an online presence. Online quotes will allow policyholders the chance to discover multiple insurance companies and check their prices. Drivers are no longer required to get quotes from just a few known insurance companies. Also, local and regional insurers can provide lower insurance rates for the same services. Accurate insurance estimates. Online quotes can only be accurate if the customers provide accurate and real info about their car models and driving history. Lying about past driving incidents can make the price estimates to be lower, but when dealing with an insurance company lying to them is useless. Usually, insurance companies will do research about a potential customer before granting him coverage. Online quotes can be sorted easily. Although drivers are recommended to not choose a policy just based on its price, drivers can easily sort quotes by insurance price. Using brokerage websites will allow drivers to get quotes from multiple insurers, thus making the comparison faster and easier. For additional info, money-saving tips, and free car insurance quotes, visit https://compare-autoinsurance.Org/ Compare-autoinsurance.Org is an online provider of life, home, health, and auto insurance quotes. This website is unique because it does not simply stick to one kind of insurance provider, but brings the clients the best deals from many different online insurance carriers. In this way, clients have access to offers from multiple carriers all in one place: this website. On this site, customers have access to quotes for insurance plans from various agencies, such as local or nationwide agencies, brand names insurance companies, etc. "Online quotes can easily help drivers obtain better car insurance deals. All they have to do is to complete an online form with accurate and real info, then compare prices", said Russell Rabichev, Marketing Director of Internet Marketing Company. CONTACT: Company Name: Internet Marketing CompanyPerson for contact Name: Gurgu CPhone Number: (818) 359-3898Email: [email protected]: https://compare-autoinsurance.Org/ SOURCE: Compare-autoinsurance.Org View source version on accesswire.Com:https://www.Accesswire.Com/595055/What-Are-The-Main-Benefits-Of-Comparing-Car-Insurance-Quotes-Online View photos