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.
SEND TO A FRIEND: 1  This may seem a stupid question to some people, but I have always wondered it myself so I rated it a good question. I have always wondered that myself. 2  those are the fuses you light, when it dries, to get it to explode. 3  The strings that go up and down the length of bananas are called Phloem Bundles.