A hearing aid is an electronic device that amplifies sound for people with hearing loss. It has four main components: a microphone that receives sound, an amplifier that makes the sound louder, a receiver that delivers the amplified sound into the ear, and a battery that powers the device. There are several types of hearing aids including ones that fit behind, inside, or completely inside the ear canal. The type used depends on the severity of hearing loss and individual needs and preferences. Hearing aids require regular maintenance like cleaning and replacing batteries to function properly.

2. What is a Hearing Aid?
 A hearing aid is an electronic, battery-operated device
that amplifies and changes sound to allow for
improved communication.

3. Components of Hearing Aids
 Microphone: Receives sound and converts it into
electrical impulses. (picks up sound)
 Amplifier: Intensifies electrical impulses. (makes sound
louder)
 Receiver: Translates those electrical impulses into louder
sounds. (delivers amplified sound into ear-miniature
loudspeaker)
 Battery: Serves as power source for device.
 Earmolds (earpieces) : directs the flow of sound into the
ear and enhance sound quality.

6. Indication
 Hearing loss

7. Types of Hearing Aid
 Pocket Model
 Behind-the-Ear (BTE)
 In-the-Ear (ITE)
 In-the-Canal (ITC), Mini Canal (MIC)
and Completely-in-Canal (CIC) aids
 Spectacle type
 Remote microphone (RM)
 Bone conduction (BC) hearing aid

8. Pocket model
 Worn in pocket at
chest level.
 A cord transmits the
electrical output to a
receiver, which
converts this signal
into sound.

9. Behind-the-Ear (BTE)
 BTE hearing aids are worn behind the ear and are
connected to a plastic earmold that fits inside the outer ear.
 The components are held in a case behind the ear. Sound
travels from the aid through the earmold into the ear.
 Poorly fitting BTE earmolds may cause feedback, a whistle
sound caused by the fit of the hearing aid or by buildup of
earwax or fluid.

11. In-the-Ear (ITE)
 ITE hearing aids fit completely in the outer ear and are
used for mild to severe hearing loss.
 The case, which holds the components, is made of hard
plastic. ITE aids can accommodate added technical
mechanisms such as a telecoil, a small magnetic coil
contained in the hearing aid that improves sound
transmission during telephone calls.
 ITE aids can be damaged by earwax and ear drainage, and
their small size can cause adjustment problems and
feedback. They are not usually worn by children because
the casings need to be replaced as the ear grows.

13. In-the-Canal (ITC)
 ITC hearing aids are customized to fit the size and shape of
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the ear canal and are used for mild or moderately severe
hearing loss.
Small one-piece hearing aid
All components contained in a custom-fit, hard-molded
plastic shell
Fits outside the ear canal
Slightly visible in the ear

15. Completely-in-Canal (CIC)
 CIC hearing aids are mostly concealed in the ear canal and
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are used for mild to moderately severe hearing loss.
Not suitable for people with severe hearing losses.
Because of their small size, canal aids may be difficult for
the user to adjust and remove, and may not be able to hold
additional devices, such as a telecoil.
Canal aids can also be damaged by earwax and ear
drainage. They are not recommended for children.
All components contained in a custom-fit, hard-molded
plastic shell

17. Spectacle type
 The hearing aid components are incorporated within a
spectacle frame.
 It is useful for those who use glasses along with
hearing aids.

19. Remote microphone
 It combines the advantage of BTE and ITE models.
 This model is virtually invisible.

21. Bone conduction hearing aid
 A bone conduction vibrator is placed on the mastoid
bone behind the ear.

23. Care and maintenance of Hearing Aid
 Prevent it from falling down
 Don’t spill liquids on the hearing aid.
 It must fit well.
 Cords should not be twisted or knotted.
 Protect it from dust, dirt and heat.
 Remove the battery from hearing aid when it is not in
use.
 Remember to detach the ear mould from the receiver
before washing the mould. Receiver sould not come in
contact with the water.

24. Thank you