HEARING DEVICE COMPRISING A FEEDBACK DETECTOR
First Claim
1. A hearing device adapted for being arranged at least partly on a user'"'"'s head or at least partly implanted in a user'"'"'s head, the hearing device comprisingan input unit for providing a multitude of electric input signals representing sound,a signal processing unit providing a processed signal based on one or more of said multitude of electric input signals, andan output unit comprising an output transducer for converting said processed signal or a signal originating therefrom to a stimulus perceivable by said user as sound;
- the input unit comprisinga first input transducer for picking up a sound signal from the environment and providing a first electric input signal, the first input transducer being located on the head of the user;
a second input transducer for picking up a sound signal from the environment and providing a second electric input signal, the second input transducer being located at or in an ear canal of the user, the hearing device further comprisinga feedback detector comprisinga first signal strength detector for providing a signal strength estimate of the first electric input signal, anda second signal strength detector for providing a signal strength estimate of the second electric input signal,a comparison unit operationally coupled to the first and second signal strength detectors and configured to compare the signal strength estimates of the first and second electric input signals and to provide a signal strength comparison measure indicative of the difference between said signal strength estimates;
a decision unit for providing a feedback measure indicative of current acoustic feedback from said output transducer to said first and/or second input transducer based on said signal strength comparison measure.
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Accused Products
Abstract
The application relates to a hearing device comprising a) first and second input transducers for picking up sound signals from the environment and providing first and second electric input signals, b) a first and signal strength detectors for providing signal strength estimates of the first and second electric input signal, the first input transducer being located at or behind an ear of the user, and the second input transducer being located at or in an ear canal of the user. The hearing device further comprises c) a signal processing unit providing a processed signal based on the first and second electric input signals, and d) an output unit comprising an output transducer for converting the processed signal or a signal originating therefrom to a stimulus perceivable by said user as sound. The hearing device further comprises e) a feedback detector comprising e1) a comparison unit operationally coupled to the first and second signal strength detectors and configured to compare the signal strength estimates of the first and second electric input signals and to provide a signal strength comparison measure indicative of the difference between the signal strength estimates, and e2) a decision unit for providing a feedback measure indicative of current acoustic feedback from the output transducer to the first and/or second input transducers based on the comparison measure. In an embodiment, the feedback measure is used to control processing in the signal processing unit, e.g. a beamformer unit and/or a feedback cancellation system, and/or an amplification unit. The invention may e.g. be used in hearing aids, in particular hearing aids comprising an ITE-part adapted for being located at or in an ear canal of a user and a BTE-part adapted for being located at or behind an ear or the user.
22 Citations
20 Claims
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1. A hearing device adapted for being arranged at least partly on a user'"'"'s head or at least partly implanted in a user'"'"'s head, the hearing device comprising
an input unit for providing a multitude of electric input signals representing sound, a signal processing unit providing a processed signal based on one or more of said multitude of electric input signals, and an output unit comprising an output transducer for converting said processed signal or a signal originating therefrom to a stimulus perceivable by said user as sound; -
the input unit comprising a first input transducer for picking up a sound signal from the environment and providing a first electric input signal, the first input transducer being located on the head of the user; a second input transducer for picking up a sound signal from the environment and providing a second electric input signal, the second input transducer being located at or in an ear canal of the user, the hearing device further comprising a feedback detector comprising a first signal strength detector for providing a signal strength estimate of the first electric input signal, and a second signal strength detector for providing a signal strength estimate of the second electric input signal, a comparison unit operationally coupled to the first and second signal strength detectors and configured to compare the signal strength estimates of the first and second electric input signals and to provide a signal strength comparison measure indicative of the difference between said signal strength estimates; a decision unit for providing a feedback measure indicative of current acoustic feedback from said output transducer to said first and/or second input transducer based on said signal strength comparison measure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification