Hearing aid

"Hearing impairment affects approximately 10％ of the population. Although people of all ages can be affected by a hearing loss, the majority of people with impaired hearing are over 60 years old and their hearing loss is related to the aging process. As a rule the deterioration of hearing ability is not painful and is therefore often not taken seriously. A proper hearing aid, however, can help people who has hearing disability to hear world more clear. A hearing aid is a device used to help the hard-of-hearing hear sounds better. In the past, a funnel-like amplification cone, called an ""ear trumpet"" or ""ear horn"", was used. Now, however, the most common style is a small electronic device that fits into the wearer's ear. The first variety of this device had a rectangular battery pack connected by a thin wire, intended to be held in a pocket. Hearing aids are distinguished by where they are worn: in the ear (ITE), in the canal (ITC), completely in the canal (CIC), behind the ear (BTE), or on the body. "