Hearing aid, in-the-ear

Intended purpose

A hearing aid is an electronic, battery-operated device that amplifies and changes sound to allow for improved communication. Sound is received though a microphone, which then converts the sound waves to electrical signals. An amplifier increases the loudness of the signals and then transmits the sound through a speaker in to the ear canal. An In-the-Ear instrument is completely contained in a custom-made acrylic shell or casing that fits into the outer ear, close to the eardrum.