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hearing aid
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Introduction References & Edit History Related Topics
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hearing aid Man wearing an in-the-ear hearing aid, which fits completely inside the outer ear. Woman wearing a behind-the-ear hearing aid.
Know about the rich history and technological advancement of the audiology department at the Northwestern University's Center for Audiology, Speech, Language, and Learning
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Aspirin pills.
7 Drugs that Changed the World
Photo of the antacid Tums
How Do Antacids Work?
Still from the film Deliverance, 1919. The story of Helen Keller and Anne Sullivan. View shows Keller in the cockpit/front seat of an airplane.
How Did Helen Keller Fly a Plane?
People wearing surgical masks (also called face mask or medical masks or safety masks) walk through the city center of Milan, Italy on Feb. 23, 2020. Coronavirus disease COVID-19 pandemic
How Do Face Masks Control the Spread of Disease?
Nuthatch. nuthatch and creeper. bird. Red-breasted Nuthatch (Sitta canadensis) a small songbird in mid-winter. Near Fairmont Hot Springs, BC, Canada.
How Do Birds Hear?
Discover
Panama Canal infographic
Timeline and Map of the Panama Canal
Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland
The Largest Islands in the World
Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society
The 10 Greatest Basketball Players of All Time
Entrants falling and tumbling over while chasing the cheese at the 2016 'Cheese Rolling' held at Cooper's Hill, in the Cotswolds, Brockworth England
7 of the World’s Most Dangerous Festivals
Monitor. Varanus salvadorii is a monitor lizard found in New Guinea can grows to 2.7 metres (9 ft.) aka Tree crocodile, Crocodile monitor, Salvadori's monitor, artellia, reptile
7 of the World’s Most Dangerous Lizards and Turtles
Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro
Why Is Christmas in December?
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes

hearing aid: References & Edit History

Article Contributors

Primary Contributors

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Added information on digital hearing aids and on different styles of hearing aids. Jun 03, 2016
Deleted Web site: GreatCall. Oct 15, 2013
Media added. Feb 07, 2012
Media added. Aug 14, 2008
Added new Web site: How Stuff Works - Health - How Hearing Aids Work. Jul 31, 2008
Article added to new online database. Jul 20, 1998
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