Yeah that’s terrible. I mentioned elsewhere that my tv uses a different system and it’s actually what they should be hoping you have available. My audiologist said it’s an evolution of the old inductive loops (ah back in the day I almost got one of those designed for personal headphone use). I can’t confirm it is because I’m not taking it apart while trying to remember how the fuck electromagnetic communication works.

Also depending on the performance I’m amazed that people can hook it up. I still turn mine off for concerts, though that may be more the music I like is the sort to make me go deafer than my genes.