This isn't your issue though. A group chooses to talk in an environment where they can barely hear each other. Rather than using a device for it, I'd recommend to perceive the problem as it is and solve it in a conventional way. E.g. by saying "I couldn't hear shit, and you too probably. That's stupid, let's go <goodplacename> instead" unless it's hard to do. Generally these places are designed for you to suffer unless you're screaming all the time and are indifferent to surroundings. I don't get why people go there and leave money, cause I wouldn't go there even for that money. You don't want an AI device that replaces respect for each others limits.