Definition: Sound amplification system, that increase the level of surrounding sounds to make them audible to hearing aid users.
Goals and uses of hearing aids
- Amplify normal speech.
- Hear warning signals.
- Help in education & language development.
Components:
1-Microphone: pick up sounds and transfer to electric energy.
2-Amplifier: amplify the electric energy.
3-Receiver: converts electric energy to sounds.
3-Receiver: converts electric energy to sounds.
4-Power supply.
5-Controls: gain and tone control.
Types of Hearing aids
- Air conduction: Open fit, behind the ear (BTE),in the canal hearing aid (CIC),or receiver in the ear.
- Bone conduction hearing aid