Hearing Aids and how it works?

Hearing aids is a wonderful device which actually changes the person’s life. The device is small in size but the wonder it to the person’s life is very big, the person who are wearing it can better experience it. Definitely many of these people who are wearing it and the others too might just wonder how actually it works. Let’s discuss the basic working behind this amazing device. These days with the help of digital science, we have various different types of hearing aids available in the market.



With the difference in the technology behind every different type, the basic components are the same; a microphone, an amplifier and a receiver. Without any one of these, this device would just be unable to work. Microphone is for picking the sound around you and sends the sound to the amplifier which amplifies that sound using an electronic circuitry and then the amplified sound passed to the receiver which transfers the amplified sound to the inner ear to get heard. One more component is very important; battery which is used to provide current to the circuit. All these components are housed in a small case which can be fitted in different manners at different places.



From the above description, everybody can see that it is just a sound amplifier. We have two basic categories of this device; Digital and Analog. These two types got further classified in their categories. Analog have conventional and programmable aids; programmable aids have a feature to program specific functionality within the hearing aids to make it suited for unlikely environments. The various settings can be changed using a remote control or the switch.



Digital ones are similar in working as the programmable ones just the difference is that the former are self adjusting. The person who is wearing does not have to do any setting; all the changes are done as per the surrounding environment. In digital, only the high or the low impulses of signal from the microphone are taken and amplified using the digital signal processing to have the extra features in this amazing device. As only the high and the low impulses are considered, the noise gets reduced. These all features make it expensive than the analog ones.



These devices are also classified as per their style; like we have four popular styles. They are BTE (behind-the-ear), ITE (in-the-ear), ITC (in-the-canal) and the CIC (completely-in-canal). This classification is based on where the basic components actually fit in the ear.



In addition to all the above types, we have one more type, which is less known and is designed for the people with the damaged ear drum or the ear canal called as "bone conduction" hearing aid. The ear drums are so damaged that the above mentioned types are not feasible. It has an additional component; oscillator which is used for receiving the sound signals and producing the vibrations according to their pattern.







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