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US 2024/0007801 A1Published application
Method of suppressing acoustic feedback in a binaural hearing aid system
AssigneeWidex A/S
InventorsAlan WIINBERG, David PELEGRIN-GARCIA, Craig MITCHELL
Life of this patent
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Abstract
A binaural hearing aid system comprising a first hearing aid (200) and a second hearing aid, with improved adaptive feedback suppression based on probe noise signals and a method (300) of operating such a binaural hearing aid system.
Claims15
A binaural hearing aid system comprising a first hearing aid and a second hearing aid,
- wherein each of the first and second hearing aids comprises:
- an acoustical-electrical input transducer configured to receive an audio input signal and to output an input transducer output signal;
- signal processing means configured to process a residual signal to generate a processed residual signal;
- an electrical-acoustical output transducer configured to receive an output transducer input signal and to generate an audio output transducer output signal;
- a probe noise generator configured to generate a probe noise signal;
- an adaptive feedback estimator configured to receive the residual signal and the probe noise signal and to estimate, based thereon, an acoustic feedback path;
- an adaptive acoustic feedback suppression filter configured to receive the output transducer input signal and to provide a feedback cancellation signal based on the estimated acoustic feedback path;
- a first combiner, configured to combine the processed residual signal with the probe noise signal and providing the output transducer input signal;
- a second combiner, configured to subtract the feedback cancellation signal from the input transducer output signal and hereby to generate the residual signal;
- and
- wherein the binaural hearing aid system further comprises:
- a synchronization controller configured to synchronize the probe noise generator of the first hearing aid with the corresponding probe noise generator of the second hearing aid.
9 more elements
A method of suppressing acoustic feedback in a binaural hearing aid system comprising a first hearing aid and a second hearing aid, the method comprising the following steps:
- receiving, by an acoustical-electrical input transducer an audio input signal and providing an input transducer output signal;
- processing a residual signal to generate a processed residual signal, wherein the residual signal is provided by subtracting a feedback cancellation signal from the input transducer output signal;
- generating by an electrical-acoustical output transducer an acoustical output transducer output signal based on an output transducer input signal;
- generating a probe noise signal;
- estimating, by an adaptive feedback estimator, an acoustic feedback path based on the received residual signal and the probe noise signal;
- combining, by a first combiner, the processed residual signal with the probe noise signal and hereby providing the output transducer input signal;
- receiving, by an adaptive acoustic feedback suppression filter, the output transducer input signal and generating the feedback cancellation signal based on the estimated acoustic feedback path;
- and
- synchronizing, the probe noise signal of the first hearing aid with the probe noise signal of the second hearing aid.
6 more elements
Dependencies are inferred from the claim text.