söndag 14 september 2014

Powering a hearing implant


Powering a hearing implant

The device is powered by a battery that is recharged when the user places a small radio transmitter against his or her head for 60 to 90 minutes. The transmitter is held to the skin by a magnet in the implant. An inductive coil in the implant converts the radio energy to electricity and recharges the battery with it. The battery can stay inside the body for at least five years, according to the company, before it needs to be replaced.

a microphone implanted underneath the skin behind the user’s ear.

Internal radio receiver with external radio transmitter
HEARING AID The present invention relates to a hearing aid system comprising a hearing implant and method of powering a hearing implant.
Broadly speaking the present invention is based on powering a middle or inner ear implant using a light signal.

It is possible for powering using a photo electric receiver
photoreceiver of the ear implant and converted to an electrical signal for driving the hearing actuator.

A major feature of Spindel's approach is that the device doesn't obstruct the normal hearing process. "Leaving the middle ear system intact and establishing a second independent input pathway to the inner ear opens the possibility for using the normal acoustic pathway and round window electromagnet simultaneously to establish constructive and destructive sound patterns in the inner ear,"

See the following picture of a Spindel middle ear implant

Hearing Aid Is there a better ear?
By David Plotz
The Project
What if we use the implant technology on undamaged ears? People with normal hearing could wear implants—or in a much less intrusive procedure, removable amplifiers in the middle ear—that would receive signals from microphones outside the ear.

There's no limit to what microphones could feed into the ear. Wearing a directional microphone would enable you to eavesdrop on conversations across a room or behind you. There are also microphones that enhance the "cocktail party effect"—the phenomenon that allows you to tune out loud chatter in order to hear the person talking to you. Such a mike would amplify a conversation right next to you but wash out all the other ambient noise. Using a combination of mikes would permit you to eavesdrop at a distance and then focus in on up-close chatter, with the flick of a switch.

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