Large Area Listening Systems. Large area listening systems are the most popular of all hearing enhancement devices, and are used in theaters, movie houses, auditoriums and houses of worship. There are three basic types: FM radio, infra-red (IR) light and a looped wire around the room, called an induction loop.
The strings are called Phloem Bundles (pronounced flom). They are part of the system that carries nutrition to all parts of the banana.
1 Unripe green bananas cause constipation because they still have a lot of starch, which can be hard for the body to digest.  Bananas also contain fiber (pectin), which draws water from the intestines toward the stool.