| 摘要 |
The aim is to reduce the costs of producing hearing aids whose induction coils are dumbbell shaped. To achieve this it is proposed mounting the core extensions ( 3 ) onto the ends of the core ( 1 ). Mu-metal disks or, as the case may be, mu-metal disks rings ( 3, 4 ) are preferably attached to the ends of the core ( 1 ). This will ensure production at an economical price; the induction coil will furthermore have high magnetic lateral sensitivity, which is advantageous during telephoning.
|
