In electromagnetic devices, it is often difficult to control the spatial relationship of the magnet and coil.
Because the magnet is attached to one portion of the anatomy and the coil attached to another part, the patient may observe a wide variation in performance.
As the relationship between the coil and the magnet changes, it results in a variance of the frequency response and a significant fluctuation of output levels.
An electromechanical device has an energizing coil and a magnet that are housed within an assembly which optimizes spatial and geometric relationships in order to avoid variability.
The electromechanical transducer directly connects to the ossicular chain (any of certain small bones, as those of the middle ear) to transmit the mechanical energy that is produced.