| 摘要 |
An electrical transducer includes a magnet having first and second poles, a paramagnetic flux concentrator, and a diamagnetic spacer disposed between the flux concentrator and one pole of the magnet. The transducer produces a directional magnetic field region and a directional, approximately linearly decreasing, electric field along an axis of the flux concentrator and substantially beyond the magnetic field. The transducer produces variations in portions of the directional electric field extending beyond the magnetic field region in response to variations caused in the magnetic field by excitation of a coil surrounding the flux concentrator. Variations in the electric field intensity in the region of the directional electric field cause corresponding variations in the magnetic field produced by a sensor. Those variations are sensed using a Hall effect sensor. A method of two-way communication between a nerve into which the directional field extends is disclosed. One of the disclosed devices is used as an improved hearing aid that aims the directional electrical field into nerves in a person's inner ear to produce electrical signals representing sound in those nerves.
|
