One removable device, the Lyric from InSound Medical of Newark, Calif., sits inside the ear and costs up to $3, 600 annually. (It is disposable and must be replaced regularly.)

加州的InSound Medical of Newark公司生产一种名为Lyric的可移动装置，它可以置于耳朵内部，但每年成本超过3600美元（这是一种一次性装置，必须定时更换）。

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It's not quite implantable, but Insound Medical's new Lyric hearing aid is about as close as you can get, with it designed to squeeze in deep in your ear canal and sit just a few millimeters from your ear drum.

ENGADGET: Insound's Lyric hearing aid cozies up right next to your ear drum

Of course, a device of that size also poses a number of problems, but Insound appears to have all those sorted out, with it employing a special "spongy material" that allows moisture to escape and prevent infection, and a magnet to actually remove the device from the ear.

ENGADGET: Insound's Lyric hearing aid cozies up right next to your ear drum