You can get neck loops that plug into your ipod, computer etc. I also have one like the one described in the article, which involves placing a loop of wire around the entire room pinned under the carpet, this is then connected to an amplifier which you can adjust to a level at which you can hear, without disturbing other people who are also watching the TV. My church also has one of these installed which is connected to the microphones on the lecterns. I use both types, although it is very old technology, they are very effective.