Hearing Aids
A hearing aid or hearing device is a small device that can be worn in or behind
the ear. It makes sounds louder so that a person who has a hearing loss can listen,
communicate and participate more fully in daily activities.
Hearing aids typically have 4 basic parts: a microphone, a processor, an amplifier
and a speaker. The microphone receives the acoustic signal and converts it into
an electrical one. The processor is a computer chip that determines exactly how
the sound will be amplified according to the individual’s hearing loss, the amplifier
increases the power of the electrical signal accordingly and the speaker converts
ical signal back into an acoustic one.