Translation tools, air purifiers: face masks go high-tech

These two inventions are great inventions. It can be hard for people that speak different languages to communicate when you can't see someone's mouth, the translator can help with that. While a mobile and compact air purifier will heavily benefit many people.

For those seeking to combat the effects of pollution in smog-choked cities, South Korea's LG Electronics has developed an air purifier mask.

As long as the air is filtered both going in and out it should be fine, probably too heavy and expensive to become popular, but for people that feel suffocated while using masks even for a short time this would be quite useful, (and way cheaper and easier to use than the available powered air purifying respirators that cover the whole head)

I wanted to buy N95 mask for myself. Just wanted to know if we face any difficulty breathing while doing aerobic exercises. Also wanted to know about the effectiveness of valved N95 masks.

@Mike Linz

There is a well-known problem with valved N95 masks:

https://economictimes.indiatimes.com/industry/miscellaneous/why-the-government-wants-you-to-stop-wearing-a-valved-n95-mask/valve-issues/slideshow/77164635.cms