A hearing aid is a small electronic – amplifying device that you wear in or behind your ear. It makes some sounds louder so that a person with hearing loss can listen, communicate, and participate more fully in daily activities. A hearing aid can help people hear more in both quiet and noisy situations.
Most hearing aids share several similar electronic components; a microphone, amplifier, speaker. The hearing aid receives sound through a microphone, which transfers the sound waves to electrical signals and sends them to an amplifier. The amplifier increases the power of the signals and then sends them into the ear canal through a speaker.
Hearing aids differ in design, technology used to achieve amplification & special features associated with sound quality.
The selection of hearing aids is based on the type and severity of hearing loss, listening needs, and lifestyle.