Everything fine just have too
Everything fine just have too much of it right now. If I were you, I would try to develop a light weight canister I could hook up to a sealed face mask with a speaker so I could be heard. Scuba stores already have steal tanks. You might be able to make them even lighter because they wouldn’t have to stand up to water pressure. The mask could be designed to plug into an outlet at your seat at a concert venue. Even when there is not a pandemic.