Hearing device with motion sensor used to detect feedback path instability
AssigneeStarkey Laboratories, Inc.
InventorsSina Miran, Tao Zhang, Henning Schepker
Life of this patent
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Abstract
An audio input signal is digitized via circuitry of an ear-wearable device. An adaptive feedback canceller has an adaptive filter producing an output that is inserted into the digitized audio input signal to cancel feedback. A motion detector provides a motion signal indicative of motion of the car-wearable device. A processor is operable to determine a change in a feedback path based on the motion signal. The processor causes the adaptive filter to have faster adaption in response to the change in the feedback path is above a first threshold. The processor also causes the adaptive filter to have slower adaption in response to the change in the feedback path being below a second threshold.
Claims20
An ear-wearable device, comprising:
- an input sensor that provides an audio input signal, the audio input signal being digitized via circuitry of the ear-wearable device;
- an adaptive feedback canceller comprising an adaptive filter producing an output that is inserted into the digitized audio input signal to cancel feedback;
- a motion detector providing a motion signal indicative of motion of the ear-wearable device;
- and
- a processor operable to determine a change in a feedback path based on the motion signal indicating a rapid motion of a head of a wearer of the ear-wearable device, the processor causing the adaptive filter to have faster adaption in response to the change in the feedback path being above a first threshold, the processor causing the adaptive filter to have slower adaption in response to the change in the feedback path being below a second threshold.
A method comprising:
- digitizing an audio input signal from an input sensor of an ear-wearable device;
- receiving a motion signal indicative of motion of the ear-wearable device, wherein the motion signal indicates at least one of a rapid motion of the head of a wearer of the ear-wearable device or that a wearer of the ear-wearable device is or will be moving an object in proximity to the ear-wearable device, the movement of the object affecting the feedback path;
- detecting a change in a feedback path based on the motion signal;
- causing an adaptive filter to have faster adaption in response to the change in the feedback path being above a first threshold, otherwise causing the adaptive filter to have slower adaption in response to the change in the feedback path being below a second threshold;
- and
- using an output of the adaptive filter to form a feedback cancellation signal that is inserted into the digitized audio input signal to cancel feedback.
An ear-wearable device, comprising:
- an input sensor that provides an audio input signal, the audio input signal being digitized via circuitry of the ear-wearable device;
- an adaptive feedback canceller comprising an adaptive filter producing an output that is inserted into the digitized audio input signal to cancel feedback;
- a motion detector providing a motion signal indicative of motion of the ear-wearable device;
- and
- a processor operable to determine a change in a feedback path based on the motion signal, the processor causing the adaptive filter to have faster adaption in response to the change in the feedback path being above a first threshold, the processor causing the adaptive filter to have slower adaption in response to the change in the feedback path being below a second threshold;
- wherein determining the change in the feedback path based on the motion signal comprises inputting the motion signal into a decoder, the decoder configured via training data to map the motion signal to the change in the feedback path.
Dependencies are inferred from the claim text.