Hearing aid and method for operating a hearing aid to suppress electromagnetic disturbance signals
AssigneeSiemens Audiologische Technik GmbH
InventorUllrich Sigwanz
Life of this patent
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Abstract
Given a hearing aid comprising a microphone, a signal processing unit and an earphone, a detector element for detecting electromagnetic disturb signals is provided, as well as a filter element that is configured dependent on the recognized disturbance signals in order to suppress the disturbance signals. Furthermore, the hearing aid as a clock element for acquiring the clock frequency of the disturbance signal detected by the detector element, whereby the clock element serves the purpose of generating the system clock frequency of the hearing aid proceeding from the clock frequency of the disturbance signal. This enables a particularly efficient disturbance signal suppression.
Claims11
A hearing aid comprising:
- a microphone which converts an incoming audio signal into an electrical microphone output signal;
- a signal processing unit connected to said microphone for processing said microphone output signal to produce a processed signal, said signal processing unit including a filter element which is configurable dependent on a system clock frequency in said signal processing unit;
- a detector element for detecting externally-originating electromagnetic disturbance signals, said disturbance signals having a clock frequency;
- a clock element in said signal processing unit, connected to said detector element, for identifying the clock frequency of the disturbance signal and wherein said signal processing unit generates said system clock frequency dependent on said clock frequency of said disturbance signal to configure said filter element to filter said disturbance signal out of said processed signal;
- and
- an earphone supplied with said processed signal for converting said processed signal into an audio output signal.
A method for operating a hearing aid having a microphone which converts incoming audio signals into electrical microphone output signals, a signal processing unit which processes said microphone output signals to produce a processed signal, and an earphone supplied with said processed signal for converting said processed signal into an audio output signal, said method comprising the steps of:
- in said hearing aid, detecting externally-originating electromagnetic disturbance signals, said disturbance signals having a clock frequency;
- in said signal processing unit, identifying the clock frequency of the disturbance signal;
- generating a system clock frequency for use in producing said processed signal dependent on said clock frequency of said disturbance signal;
- and
- configuring a filter element in said signal processing unit using said system clock frequency, dependent on said clock frequency of said disturbance signal, to filter said disturbance signal out of said processed signal.
Dependencies are inferred from the claim text.