US 12,302,069 B2
Hearing aid including a piezo assembly and an electromagnetic assembly
Johannes Kocher, Askim (SE); and Erik Holgersson, Askim (SE)
Assigned to OTICON MEDICAL A/S, Smørum (DK)
Filed by Oticon Medical A/S, Smørum (DK)
Filed on Dec. 6, 2022, as Appl. No. 18/075,994.
Claims priority of application No. 21212676 (EP), filed on Dec. 7, 2021.
Prior Publication US 2023/0179932 A1, Jun. 8, 2023
Int. Cl. H04R 25/00 (2006.01); B06B 1/02 (2006.01); B06B 1/06 (2006.01)
CPC H04R 25/606 (2013.01) [B06B 1/0207 (2013.01); B06B 1/0644 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A hearing aid configured to apply a main vibration onto a skull of a recipient of the hearing aid, and wherein the hearing aid includes a vibrator comprising:
a first assembly which comprises a magnet configured to provide a static magnetic flux and a coil configured to provide a dynamic magnetic flux based on a first current, and the coil is wrapped around at least a part of the magnet,
a second assembly which includes a vibrator transfer unit and a suspension spring, and wherein the first assembly is configured to move relative to the second assembly generating a first vibration based on the static and the dynamic magnetic flux, and the first vibration is transferred to the vibrator transfer unit,
a first piezo assembly configured to move based on a second current generating a second vibration, and wherein the first piezo assembly is connected to the vibrator transfer unit, and when the first piezo assembly moves a second vibration is generated, and the second vibration is transferred to the vibrator transfer unit, and
wherein the main vibration is transferred to a skull of the recipient via the vibrator transfer unit, wherein the vibration includes the first vibration and/or the second vibration, and
wherein the hearing aid further comprises a sensor configured to monitor an output force of the second assembly and provide a monitor signal, and a processing unit configured to determine the level of the first current and/or the second current based on the monitor signal to obtain a wanted output force of the second assembly.