Behind the ear

Types of Hearing Aids. Enumerate Advantages and Disadvantages – JUNE 2016

DEFINITION – It is a device used to amplify the sounds for pronounced irreversible hearing loss and helps in clarity of hearing. PARTS –a) Microphone which collects the sound and transforms into electrical energy. It has a diaphragm with an electromagnet behind it.b) Amplifier which magnifies electrical impulses by use…