225 W Sta Sq Dr #200, Pittsburgh, PA 15219 4 Sta Sq Commerce Ct, Pittsburgh, PA 15219 4 Sta Sq SUITE 200, Pittsburgh, PA 19102 (412)2613200, (412)4719427
Us Patents
Shielded Magnetic Assembly For Use With A Hearing Aid
Cyrus N. Ashtiani - Pittsburgh PA Zoltan J. Cendes - Pittsburgh PA
Assignee:
Richards Medical Company - Memphis TN
International Classification:
A61N 100
US Classification:
1284206
Abstract:
A shielded magnetic assembly for use in a magnetic hearing aid is described. The shielded assembly uses a disc-shaped magnet with a high permeability, low coercivity material placed on the face of the magnet away from the air gap. Preferably, the shielding material also covers portions of the edge of the magnet to form a cap. The shielding focuses the magnet's energy into the air gap to improve coupling and reduce interference from external magnetic fields.
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