The Razer Zephyr Is Useless- But It Has Potential
Channel: Naomi Wu
Date: 2021-11-01

Full engineering breakdown, what the Zephyr does right, what it gets wrong, why, and how Razer can fix it.
Razer Zephyr: https://www.razer.com/gear-accessories/razer-zephyr
Flashforge Creator 3 Pro: https://www.flashforge.com/product-detail/flashforge-creator-3-pro-3d-printer

00:08 Street Demo
01:09 Intro and Disclaimer
02:28 Zephyr Unboxing
05:00 Zephyr App
06:24 Zephyr Try-On
07:03 Mask Types
08:27 PAPR Demo
10:10 Elastomeric Respirators
11:04 Elastomeric Respirator Exhaust Valves
12:06 3D Printed Exhalation Valve Filtration 
12:38 Power Assisted Masks
13:40 The Zephyr Design Concept and Execution
14:24 The Silicone Face Gasket
15:36 “N95 Grade Filters”
17:09 The Exhalation Port
17:41 Speaking Intelligibility
18:04 Intelligibility Test and Demonstration
18:50 Filter Surface Area and Breathing Resistance
19:28 The Zephyr’s Fans
19:40 Improved Proof of Concept- Inline Breathing Assist Module
20:10 The Modified Shigematsu TW08SF Mask
20:57 Fabricating the Breathing Assist Module Version 1
23:00 Testing the Breathing Assist Module Version 1
23:35 The Problem: Radial Versus Centrifugal Fans
24:40 Fabricating the Breathing Assist Module Version 2
25:27 Testing the Breathing Assist Module Version 2
25:58 Breathing Assist Module Conclusion
26:27 Zephyr Fan Specifications
26:48 Zephyr Sound Level Test
27:08 Engineering And Domain Expertise
28:17 Final Verdict
29:22 Thanks to Razer

Citations and more info:

Elastomeric Respirators
https://www.cdc.gov/coronavirus/2019-ncov/hcp/elastomeric-respirators-strategy/index.html
https://www.fda.gov/news-events/fda-voices/elastomeric-respirator-innovations-play-critical-role-response-covid-19
https://intjem.biomedcentral.com/articles/10.1186/s12245-020-00296-8
https://www.nytimes.com/2020/05/27/us/coronavirus-masks-elastomeric-respirators.html
https://www.nationalnursesunited.org/sites/default/files/nnu/graphics/documents/0820_COVID19_elastomericRespirators.pdf
Need more info about elastomeric respirators? Ask the Clean Air Crew https://twitter.com/CleanAirCrewOrg or Nicolas Smit https://twitter.com/ppetoheros on YouTube.

Elastomeric Exhaust Valve Citation:
https://www.cdc.gov/niosh/docs/2021-107/default.html

PAPR Citations:
https://www.ncbi.nlm.nih.gov/books/NBK294223/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6720108/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7536593/
https://www.sciencedirect.com/science/article/pii/S2468067220300389

Speaking Intelligibility Citation:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5065390/

NIOSH approved half-mask respirators with source control (without exhalation valve):
GVS Elipse P100: https://amzn.to/3jUjExl
Advantage® 290: https://us.msasafety.com/p/0001000002W0001120
Exhalation valve filters for 6000 series 3M respirators: https://amzn.to/3jWiVeP

Shigematsu TW08SF Mask:
https://www.sts-japan.com/asia/products/reusable/detail/tw08s.html

Power-Assisted Masks:
LG PuriCare™ Wearable Air Purifier:
https://www.lg.com/hk_en/puricare/lg-ap551awfa
ATMOBLUE: https://atmoblue.com/

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