Today's security and isolation booths and ticket booths are often the best step you can take to protect your employees. But do they protect and also help maintain your very important good will Not if clerks and customers have to shout and growl and repeat themselves to be heard or understood. The Alpha Communications Norcon patented TTU-1 Talk-Thru Communicator is a 2-way, hands-free audio system that provides high-quality personal communication between people separated by security or isolation barriers. It is the most widely used system of its type in the U.S., and the world.