Hearing aid with amorphous loudspeaker shielding
AssigneeSiemens Medical Instruments Pte. Ltd.
InventorSimon Hüttinger
Life of this patent
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Abstract
It should be possible to produce hearing aids in a simpler and more compact fashion. It is for this reason that a hearing aid is proposed, the loudspeaker device of which is shielded by a shielding device, more particularly a housing (21), which can shield both high-frequency and low-frequency electromagnetic fields. This shielding device is at least in part made of an amorphous, soft-magnetic metal with a preferred direction of the nanocrystalline structures. Using this, a plurality of separate shielding elements can be dispensed with and a hearing aid can have a smaller embodiment.
Claims8
A hearing aid with
- a signal-recording device (2),
- a signal-processing device (3) for processing a signal from the signal-recording device (2),
- a magnetically operated loudspeaker device (4), which converts an output signal from the signal-processing device (3) into an output sound, and
- a shielding device (21), which is arranged between the loudspeaker device (4) and the signal-processing device (3) for reducing electromagnetic interference on the signal-processing device (3) by the loudspeaker device (4),
- characterized in that
- the shielding device (21) is at least in part made of an amorphous, soft-magnetic metal with a preferred direction (24, 25) of the nanocrystalline structures.
The hearing aid as claimed in one of the preceding claims, wherein the shielding device (21) exhibits a significant shielding effect in the single-digit MHz-range.
The hearing aid as claimed in one of the preceding claims, wherein the shielding device (21) has a preferred magnetic direction (24), which runs substantially parallel to a magnetic circuit of the loudspeaker device (4).
The hearing aid as claimed in one of the preceding claims, wherein the shielding device (21) has a preferred electrical direction (25), which runs substantially perpendicular to a magnetic circuit of the loudspeaker device (4).
The hearing aid as claimed in one of the preceding claims, which is embodied as an in-the-ear hearing aid.
Dependencies are inferred from the claim text.