So I wanted to ask you guys a question that I've been mulling over for the past few weeks. Is a soundproof helmet possible? In the Star Wars Republic Commando books by Karen Traviss, the RCs have helmets that allow them to talk to their squad without the outside world hearing them - they can scream as loud as they please without anyone noticing. On the other side, they can switch to a speaker to talk to people outside of the helmet.
What are your thoughts on this? The RC helmets seem to be large, which would allow more things to be installed. My original thought was to use a thick foam and visor to help reduce my own sound, until I realized that I wouldn't be able to hear what other people are saying either. My second idea came to me as I was using a respirator to resin some pepakura. Would it be possible to wear a (half mask) respirator inside a helmet? With both a respirator muffling your voice and a (semi padded) helmet, I would assume it would be difficult for others to understand you when speaking in a normal voice.
That's where the electronics would come in. You could remove the side filters to allow a microphone to be installed (speaker in chest plate) and a two-way radio earpiece on the other side.
This is just me thinking out loud, and I have no idea if this would be plausible. What do you guys think? Is there anything out there like this? (Also, let me know if I posted this in the wrong section.)