The Protected Space Helmet was an invention that called for itself after speech control evolved to be the most effective way of controlling everything. With speech control it turned out to be impossible to write/dictate a document without sharing it with everyone. In addition all the video conversations made the public room to a very noisy place to be. The first helmet that came on the marked had most of the facilities that today’s helmets have; active sound damping both in and out of the helmet and 3D projection on the helmets inside without being visible on the outside due to the different polarization of the inside and outside polymer films. Films which also made it possible to shift between full transparency, transparency only from inside-out, or not transparent from any side. The problem when it came was the price. Much of the functions were taken from very expensive helmets used by fighter plane pilots. The breakthrough came with the pigeon flue in 2036 killing several million people before it came under control. Most of the people hit, lived in the big cities and a cleaver gay working for DigiCap Inc., the pioneers in making these helmet came up with the idea to make the helmet completely air tight and added an active filter to both the in- and outlet of the helmet. He left the company and patented the invention and brand named it the Protected Space Helmet. Ironically it turned out to be DigiCap that would produce this new helmet making both the company and the inventor very rich. Suddenly a safe protection without the side effects of a vaccine was available, which also gave all the benefits of the helmets privacy. DigiCap had a 500 time growth in revenue in only 2 years.
Default setting of the helmet was two-way transparent. It was considered as polite or friendly to do this if you didn’t have any tasks which required the privacy the helmet could offer. Research had proven that (not surprisingly) most people found it a bit uncomfortable to not being able to see the face of the people they were exposed to in public. Of security reasons the helmet had an override mode which the police could use to force the helmet transparent, and this function was also used in all gates as store entries; and the DPT gates. This came in addition to the identity validation the smartphones responded to on request.
That’s a shrewd answer to a tricky quetsion
A proivcatove insight! Just what we need!