Bone conducting hearing aid
AssigneeViennatone GmbH
InventorsRudolf Wandl, Kurt Schermann
Life of this patent
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Abstract
A bone conducting hearing aid comprises a housing adapted to be pressed against a head of a user and a magnetic system held in the hearing aid housing, The magnetic system includes a permanent magnet, a coil, an armature of a soft magnetic material and a spring holding the armature. A conductor button is arranged to move with the armature, the conductor button being shaped to be brought into contact with the mastoid bone of the user's head, and a rubber bearing having a predetermined elastic constant holds a support spring for the conductor button on the hearing aid housing. To increase the difference between the useful signal and the spurious signal received by the hearing aid, the support spring has an elastic constant not exceeding 0.4 N/cm.
Claims5
A bone conducting hearing aid incorporated in an eyeglass frame, comprising
- (a) a housing adapted to be pressed against a head of a user,
- (b) a magnetic system held in the hearing aid housing, the magnetic system including
- (1) a permanent magnet,
- (2) a coil,
- (3) an armature of a soft magnetic material and
- (4) a spring holding the armature,
- (c) a conductor button arranged to move with the armature, the conductor button being shaped to be brought into contact with the mastoid bone of the user's head,
- (d) a support made of an elastically deformable material, having a predetermined elastic constant and
- (e) a support spring for the conductor button, said elastically deformable support positioned between the housing and the support spring;
- said support holding the support spring on the hearing aid housing and the support spring having an elastic constant not exceeding 0.4 N/cm.
A bone conducting hearing aid incorporated in an eyeglass frame, comprising:
- (a) a housing adapted to be pressed against a head of a user;
- (b) a magnetic system held in the hearing aid housing, the magnetic system including
- (1) a permanent magnet;
- (2) a coil;
- (3) an armature of a soft magnetic material and
- (4) a spring holding the armature,
- (c) a conductor button arranged to move with the armature, the conductor button being shaped to be brought into contact with the mastoid bone of the user's head;
- (d) a support made of an elastically deformable material, having a predetermined elastic constant and
- (e) a support spring for the conductor button, said elastically deformable support positioned between the housing and the support spring;
- said support holding the support spring on the hearing aid housing and the support spring having an elastic constant not exceeding 0.4 N/cm;
- and
- wherein the elastic constants of the support and the support spring are substantially equal.
Dependencies are inferred from the claim text.