Researchers have found a renewable, alternative energy source that might be able to power hearing aids.
This article was originally published on The Conversation, an independent and nonprofit source of news, analysis and commentary from academic experts. Disclosure information is available on the original site.Hearing aids are essential for people with hearing loss. But hearing aids have an Achilles heel: their power supply is expensive and environmentally unfriendly.
A part of her brain is constantly on alert to make sure she has a spare box of batteries on hand. In addition to this hassle, the battery is an economic burden. Considering her battery consumption and the price per battery, Clara estimates that in 15 years, the batteries cost more than purchasing a new hearing aid.Article content
The big difference is price. A single hearing aid costs $1,000-2,000 compared to $100-300 for a pair of headphones. The business model, which involves manufacturers, medical insurers, hearing care professionals and consumers, keeps the price hight. In other words, the action of eating for 50 minutes would be enough to generate all the energy necessary for a day’s use of the hearing aid. For this experiment, the researchers placed an earplug filled with water in the ear of the participants. They then measured the pressure in the earplug created by the jaw movements. Finally, they translated these pressure variations into deformations of the ear canal.
To solve this problem, researchers have placed ribbons of piezoelectric materials along the perimeter of the earplugs. These materials creating an electric signal when they are deformed.
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