process+information+from+secondary+sources+to+evaluate+a+hearing+aid+and+a+cochlear+implant+in+terms+of+-the+position+and+type+o+energy+transfer+occuring+-conditions+under+which+the+technology+assist+hearing+-Limitations+of+each+technology

A hearing aid is a small electronic device which some people wear behind there ear. The hearing aid makes some sounds louder so the person can actually hear it properly (people who wear ear aids are usually suffering from hearing loss). The hearing aid enables the person to communicate like every other person. The hearing add can be positioned in three different places behind the ear, In the ear and in the canal .The hearing aids has 3 parts to it a microphone m amplifier and a speaker.

Below is a usefull diagram which shows where the three hearing aids are positioned:

The hearing aid works on battery powered energy, which converts sound energy to electrical energy back to sound. The technology which the hearing aid has used is the:

· microphone- Which converts the sound waves into electrical signals and send it to the amplifier. · Amplifier – Increases the power of the signal then sends it to the speaker. · Speaker- Sends what the amplifier has sent to the ear

As you can see above the hearing aid works as a step which allows the person to hear. There are limits to the amount of amplification which the hearing aid provides. There is limitations to the sizes of young children or people who are severely deaf because of the reduced size limits in their power and volume. Cochlea implants is a electronic device which is surgically implanted, it is provided for people who have lost there hearing or is having trouble in hearing. The Cochlea implants are positioned into the head behind the ear. The energy transfer from the cochlear implant is to turning sound into electrical energy this energy then sends signal to the brain. The cochlea implant is a technology which insists hearing by stimulating any functioning auditory nerves which are inside the cochlea with an electric field. The Cochlea has som technologies similar to the hearing this technologies are:  *A microphone –pick up sound · * A speech processor- from sounds it creates an audible speech and sends the electrical sound signals to the transmitter. · * transmitter – a magnet positioned behind the external ear m it transmits the sound signals to the internal device by electromagnetic induction. · * Receiver and stimulator- converts signals to electric impulses, sends them through a internal cable to electrodes. The technology limitations in the cochlea implants is that its expensive in the US the cochlea implants cost between $40,000-$100,000. Also the patient that received the implant works better for people who knows how to speak then people who have never spoken before.

The diagram below is useful as it shows where the cochlea implant is placed internally and how it looks like externally and labbles each part of the cochlea implant and the anatomy