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Helge Pontoppidan
Helge Pontoppidan Foeh, Stenlose DK
| Patent application number | Description | Published |
|---|---|---|
| 20080273728 | HEARING AID WITH FEEDBACK MODEL GAIN ESTIMATION - A hearing aid includes an input transducer for transforming an acoustic input signal into an electrical input signal, a processor for generating an electrical output signal by amplifying the electrical input signal with a processor gain, an output transducer for transforming the electrical output signal into an acoustic output signal, an adaptive feedback suppression filter for generating a feedback cancellation signal, and a model gain estimator generating an upper processor gain limit and for providing a control parameter indicating a possible misadjustment of the model. | 11-06-2008 |
| 20090067651 | HEARING AID, AND A METHOD FOR CONTROL OF ADAPTATION RATE IN ANTI-FEEDBACK SYSTEMS FOR HEARING AIDS - A hearing aid comprises at least one microphone (M) for converting input sound into an input signal, a subtraction node for subtracting a feedback cancellation signal from the input signal thereby generating a processor input signal, a hearing aid processor (G) for producing a processor output signal by applying an amplification gain to the processor input signal, a receiver (R) for converting the processor output signal into output sound, an adaptive feedback cancellation filter for adaptively deriving the feedback cancellation signal from the processor output signal by applying filter coefficients, calculation means for calculating the autocorrelation of a reference signal, and an adaptation means for adjusting the filter coefficients with an adaptation rate, wherein the adaptation rate is controlled in dependency of the autocorrelation of the reference signal. | 03-12-2009 |
Helge Pontoppidan Foeh, Bagsvard DK
| Patent application number | Description | Published |
|---|---|---|
| 20080253596 | HEARING AID AND A METHOD OF PROCESSING INPUT SIGNALS IN A HEARING AID - A hearing aid comprises two microphones, directional processing means for combining the respective audio signals to form a spatial signal, a beamformer for controlling the directional processing means to provide adaptation of the spatial signal, and means for boosting low frequencies of the spatial signal. A feedback estimator generates a feedback compensation signal, which is combined with the boosted spatial signal. By applying feedback compensation only after directional processing and low frequency boosting, the device avoids interference by the feedback estimator with the function of the beamformer. The invention also provides a method of processing signals in a hearing aid. | 10-16-2008 |
Helge Pontoppidan Foh, Stenlose DK
| Patent application number | Description | Published |
|---|---|---|
| 20080298615 | HEARING AID AND METHOD OF UTILIZING GAIN LIMITATION IN A HEARING AID - A hearing aid ( | 12-04-2008 |