BTE

like bananas curvature, V in the ear, generally about 4 ~ 5cm. Receiver opening and a hard plastic tube made of sound guiding hook connection, hang it on the ear margin root, thus hook the plastic soft tube and ear mould ear into cavity of auricular concha and the ear canal hearing aid. In some countries this type of hearing aid development the fastest, many manufacturers can provide 30 ~ 50 kinds of products of different specifications and features gradually increased. It has special type BTE required to produce large power or for deaf children to listen to the residual frequency. Due to the excellent performance, the chassis can be made of a variety of skin color, volts in the ear for the hair hidden, often not for outsiders to find, very able to meet the psychological requirements of the deaf. In some countries has become the most popular universal hearing aid, the general use rate of about 60%.

cassette

also called pocket or pocket. The volume like cigarette box, hanging in the chest pocket or pouch. Host by a wire connected earphone insertion and used in the external auditory canal, the main disadvantage is long wire, both neither is beautiful and convenient. However, due to the large volume, can be a variety of devices to regulate the switch, providing better acoustic performance, and easy to make high-power, in order to meet the needs of children with severe deafness. Use more children and the elderly, accounting for 5 to 10% of the demand.