Hearing aids are a common treatment option for hearing loss. A hearing aid is a small electronic device that is worn in or behind your ear and amplifies sounds so they can be heard better, making listening and communication easier and more enjoyable. A hearing aid consists of a microphone, amplifier and speaker. The sounds are received through the microphone and then increased in power by the amplifier, which then sends the signals to the ear through a speaker. Hearing aids magnify sounds based on the severity of a patient’s hearing loss. There is a limit on how much amplification can be given to sounds, so hearing aids are not for everyone.