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.
By contrast, Musa cultivars with firmer, starchier fruit are called plantains. In other regions, such as Southeast Asia, many more kinds of banana are grown and eaten, so the simple twofold distinction is not useful and is not made in local languages.he term banana is also used as the common name for the plants which produce the fruit.