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.
Some kinds, or cultivars, of banana have a firmer, starchier fruit. These kinds are called plantains. Plantains are mostly used for cooking or fibre. The sweet, soft bananas that are used for desserts are called dessert bananas.