Patent ID: 8649542

Claim:
A hearing aid, comprising: a signal-recording device; a signal-processing device for processing a signal received from said signal-recording device; a magnetically operated loudspeaker device converting an output signal from said signal-processing device into an output sound, said loudspeaker device having a magnetic circuit; and a shielding device disposed between said loudspeaker device and said signal-processing device for reducing electromagnetic interference on said signal-processing device by said loudspeaker device, said shielding device is at least in part made of an amorphous, soft-magnetic metal with a preferred direction of nanocrystalline structures, said shielding device having a preferred magnetic direction, running substantially parallel to said magnetic circuit of said loudspeaker device, said shielding device having a preferred electrical direction, running substantially perpendicular to said magnetic circuit of said loudspeaker device, said shielding device guiding low-frequency magnetic fields in a specific spatial direction while eddy currents, ensuring a shielding of high-frequency fields, flow with little resistance.