Low-cost Measurement of Facemask Efficacy for Filtering Expelled Droplets During Speech
September 24, 2020
Research Discussion and Live Q&A: Low-cost Measurement of Facemask Efficacy for Filtering Expelled Droplets During Speech
September 24, 2020; 11:00AM (EDT)
Presented by Dr. David Grass, Research Associate, Warren Group, Dept of Chemistry, Duke University
This webinar is offered at no cost to individual and corporate members of AATCC and at a 70% discount ($45) for nonmembers. Corporate members must contact Kim Nicholson to register offline.
AATCC is pleased to announce the PPE Testing Webinar Series will continue with a fourth webinar focusing on low-cost measurement of facemask efficacy for filtering expelled droplets during speech.
Mandates for mask use in public during the recent COVID-19 pandemic, worsened by global shortage of commercial supplies, have led to widespread use of homemade masks and mask alternatives. It is assumed that wearing such masks reduces the likelihood for an infected person to spread the disease, but many of these mask designs have not been tested in practice. We have demonstrated a simple optical measurement method to evaluate the efficacy of masks to reduce the transmission of respiratory droplets during regular speech. In proof-of-principle studies, we compared a variety of commonly available mask types and observed that some mask types approach the performance of standard surgical masks, while some mask alternatives, such as neck fleece or bandanas, offer very little protection. Our measurement setup is inexpensive and can be built and operated by non-experts, allowing for rapid evaluation of mask performance during speech, sneezing, or coughing.
About the Speaker
Dr. David Grass received his Ph.D. in physics at the University of Vienna (Austria) in the group of Professor Markus Aspelmeyer in 2018. He worked on optical methods to control micro- and nano-mechanical oscillators (optomechanics) for fundamental test of physics such as macroscopic quantum mechanics and gravity. Since 2018, he is a postdoctoral fellow in the laboratory of Professor Warren Warren at Duke University and is working on early detection of metastatic melanoma (skin cancer) with ultrafast spectroscopy and microscopy. He is a recipient of the Walter Benjamin Fellowship.
The first webinar in this series:
Impact Penetration Testing for Textiles Webinar
Recorded May 28, 2020
Presented by Diana Wyman, AATCC Executive Vice President
Impact penetration testing measures the amount of liquid that passes through a fabric under specified conditions. It is a key test for Level 1, 2, and 3 gowns and drapes in healthcare settings. This webinar will cover testing for PPE as well as other water-resistant applications. It will compare various versions of the test, including AATCC TM42, NWSP 80.3, and ISO 18695. The webinar includes full descriptions and demonstration of apparatus, materials, and testing procedure.
The second webinar in this series:
Hydrostatic Pressure Testing for Textiles Webinar
Recorded June 3, 2020
Presented by Erika Simmons, AATCC Technical Director
Hydrostatic pressure testing is required for level 2 and 3 medical gowns and drapes. It is also commonly used for evaluating high-performance rainwear. Learn to properly perform and interpret this test for any application, including when and how to use a restraint. The webinar addresses all aspects of AATCC TM127 and TM208.
The third webinar in this series:
Overview of Surgical Mask and Respirator Requirements Webinar
Recorded July 9, 2020
Presented by Matthew McGarrity, SGS – North America, Inc.
This presentation will provide an overview of surgical masks and respirator industry standard, methods, and regulations. Also discussed will be the U.S. Food and Drug Administration’s actions to help alleviate the shortage medical PPE through COVID-19 Emergency Use Authorizations (EUA’s) and Enforcement Policies. The interim policies specifically relating to surgical masks and respirators will be highlighted.
These webinars are offered at no cost to individual and corporate members of AATCC and at a 70% discount ($45) for nonmembers. Corporate members must contact Kim Nicholson to register offline.