公开(公告)号：US11432079B2

公开(公告)日：2022-08-30

申请号：US16560323

申请日：2019-09-04

Applicant: OTICON A/S

Inventor： Poul Henriksen ,  Søren Nørskov

IPC: H04R25/00

Abstract: There is provided a hearing aid with an antenna connected to a transmission and/or reception circuit for transmission and/or reception of the electromagnetic energy via the antenna. A coupling circuit, e.g. including a directional coupler, is configured to sense an electric return power from the antenna, and to generate a power signal based on the sensed electric return power. A controllable impedance circuit is connected to the antenna, so as to allow adjusting of impedance of the antenna in at least two different steps. A processor is configured to generate a tuning control signal to the controllable impedance circuit in response to the power signal. This allows control of the impedance of the antenna for minimizing impedance mismatch, and thus improve performance of the antenna by tuning the impedance to the operating conditions of the antenna, preferably in an automatic manner.

公开(公告)号：US11792584B2

公开(公告)日：2023-10-17

申请号：US17870218

申请日：2022-07-21

Applicant: OTICON A/S

Inventor： Poul Henriksen ,  Søren Nørskov

IPC: H04R25/00

CPC classification number: H04R25/554 ,  H04R2225/021 ,  H04R2225/39 ,  H04R2225/51

Abstract: There is provided a hearing aid with an antenna connected to a transmission and/or reception circuit for transmission and/or reception of the electromagnetic energy via the antenna. A coupling circuit, e.g. including a directional coupler, is configured to sense an electric return power from the antenna, and to generate a power signal based on the sensed electric return power. A controllable impedance circuit is connected to the antenna, so as to allow adjusting of impedance of the antenna in at least two different steps. A processor is configured to generate a tuning control signal to the controllable impedance circuit in response to the power signal. This allows control of the impedance of the antenna for minimizing impedance mismatch, and thus improve performance of the antenna by tuning the impedance to the operating conditions of the antenna, preferably in an automatic manner.