What is the listening of the body?
Physical auditory help is one of the earliest types of hearing aids designed for people with hearing loss. The device is powered by a transistor compartment that is usually not larger than the card package. From this case, a wire for a shaped piece that is worn in one ear runs. Hearing aids for the early body used vacuum tubes that made them two to three times larger than the new models. Today, the listener for the ear (BTE) has largely replaced the auditory aids, except in cases of preference for larger equipment or extreme hearing loss.
The history of auditory aids dates back to at least 1588, while the documentation of wooden auditory aids is shaped to look like an animal's ears that had acute hearing. At the end of the 17th century, a funnel -called trumpet device was held on the ear and was commonly used by people who had difficulty in hearing. The tubes were first commercially manufactured in 1800. When at the end of the 18th century more complex hearing aids were made, they wereDesktop models that were too large to be easily portable.
The first auditory assistance was created in 1903 and called "Acousticon". It was bulky, but small enough to make the battery compartment transmitted in the handbag. The body also had to wear a microphone receiver to raise the sounds that were transmitted to the handset. As the technology increased and the vacuum tubes that provided amplification could be reduced, the size of these devices has been reduced. After the transistors were invented in the United States in 1947, the worn AIDS body decreased and more comfortable to use.
Today, hearing aids are only one of the many types of listening aids. Some people prefer them, especially those who have a deep loss of hearing, because vacuum tubes often intensify better than small BTE devices. BTE AIDS places the speaker in the opening of the ear and are formed tofits behind the ear. There are also smaller aids that fit into the middle of the outer ear, and some that are completely hidden in the ear canal.
Body headphones are rarely visible than any of the other types. Some people prefer them because they are harder to lose and tend to endure longer than small BTE AIDS. Modern designs are shrinking because better technologies are available, so many models look almost like a compact MP3 player or other portable electronic device. Instead of being strapped to the body under clothing, modern cases of listening are usually worn in a pocket or attached to the wearer belt.