Method for actively reducing occlusion comprising plausibility check and corresponding hearing apparatus
AssigneeSiemens Medical Instruments Pte. Ltd.
InventorsGeorg-Erwin Arndt, Frank Koch
Life of this patent
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Abstract
Adaption of signal processing for actively reducing occlusion in hearing apparatuses, and in particular in hearing aids, is to be automated further. For this purpose, a transducer transmission function, which is defined for the transmission path from the input of a receiver via the auditory canal to the output of a microphone, be subjected to an automatic plausibility check. An adjustable filter via which the microphone signal is fed back is only altered if the transducer transmission function is plausible according to a predefined criterion.
Claims6
A method for actively reducing occlusion in a hearing apparatus, comprising:
- receiving a sound in an auditory canal via a microphone located in the auditory canal while outputting a corresponding microphone signal;
- filtering the microphone signal using an adjustable filter;
- feeding back the filtered microphone signal to an input of a receiver which is used to emit sound in the auditory canal, wherein the feeding back is performed by way of a signal combiner configured to invert a polarity of the filtered microphone signal;
- defining a transmission path from the input of the receiver via the auditory canal to an output of the microphone;
- measuring at least one characteristic of a transducer transmission function of the transmission path;
- determining if the transducer transmission function for the transmission path is plausible via a plausibility check;
- and
- automatically adjusting the adjustable filter to optimize occlusion reduction only when the transducer transmission function is plausible according to the plausibility check.
Dependencies are inferred from the claim text.