The level at which people hear varies greatly from one individual to another. A new technology has been introduced to help people with hearing difficulties. This new technology is called assistive listening devices or devices. It is usually abbreviated as ALS. It works by bringing the sound close to the ear.

Through research, it has been proven that individuals who have a hard of hearing ought to increase its volume so as to be able to listen and hear just like other normal people. This new technology enables them to achieve this for themselves without having to annoy or distract others by their loud noises.

The devices can also be used by individuals with all degrees of hearing loss ranging from mild to profound. This includes cochlear implants users and hearing aid users as well as people who do not use either hearing aid or cochlear implants. It is vital to note that hearing aids and cochlear implants have some performance limitations thus they do not operate well in all situations.

The system operates in different ways. It can operate by reducing the background noise, minimizing the effect of distance between the hard of the hearing person and the source of the sound or through overriding poor acoustics like echoes. The devices are commonly used in entertainment place, learning intuitions, places of work as well as back at home.

ALS systems are grouped into three categories. FM systems are the first category. It uses Radio broadcast technology to bring sound close to the receiver. This system is usually used in educational set ups. The advantage with them us that they offer mobility because the transmitters are portable thus can be worn on the body. A more recent FM system employs a miniaturized receiver that can fit onto the hearing aid.

Infrared systems are listening devices which utilize light based technology. They guarantee some kind of privacy because light is not able to pass through walls. They are the correct choice for situations like court proceedings which need confidentiality. They are often installed in places of entertainment. Also, they are designed and marketed for use in television listening.

The third system is an inductive loop. This is whereby an electromagnetic field is used to transmit sound. This system is necessary for groups which cannot wear the receivers on their body. Individuals who are using nonhearing aid can also employ this system through using a microphone together with an inductive loop receiver.

In most scenarios, an assistive listening device will have three components. These are a microphone, a transmission technology, and a device which receives signal and brings the sound to the ear. Knowing these parts is very important since it will assist you to troubleshoot problems as well as to improve the effectiveness of the system.

Setting up the devices to be used by a group is usually complex. Thus in such situations, it is necessary to hire a professional sound contractor to install the system. This is always necessary when multiple microphones are required. For instance in a large meeting of more than ten people a microphone mixer is usually indicated. The automatic microphone mixer turns microphone up and down when people speaks.