Hearing aids are small electronic devices that can be highly customized to address different types of hearing loss. All digital hearing aids contain at least one microphone to pick up sound, a computer chip that amplifies and processes sound, a speaker that sends the signal to your ear and a battery for power. Small enough to wear in or behind your ear, they create some sounds louder. There are audio players designed specifically for the hard-of-hearing. A hearing aid amplifies the sounds going into the ear. They are most often prescribed for people who have a type of hearing loss known as "sensorineural," meaning that some of the tiny hair cells of the inner ear are damaged. There are five main hearing aid manufacturers that offer the latest hearing device technology. Hearing aid Manufacturing companies invest heavily in research and development to bring devices to market that address the diverse needs of people with hearing loss. The hearing aids impact factor journals are freely available on the general public internet domain, allowing any end users to read, download, copy, distribute, prink, search or link to the complete texts of the articles. These provide top quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community.