Originally Posted by
rankourabu
I
Any older FTers want to remind us what these were all about?
These were headphones. State of the art at the time
Channeled sound waves through hollow plastic tubing into the auditory canals of user's ears. No electironic components. Used by all major airlines I flew. Useful for listening to the one movie that played at a time, either on a screen that was pulled down over the center bulkhead, or--later--on Cathode-Ray Tube TVs mounted on the ceilings. There might be a few music channels to listen, namely classical, easy-listening, and country. And, on UA, Channel 9.