Method for actively reducing occlusion comprising plausibility check and corresponding hearing apparatus
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Accused Products
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. Disadvantageous convergences of the adaptation algorithm can be avoided hereby and unnecessarily high computing times can be prevented.
26 Citations
19 Claims
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1-7. -7. (canceled)
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8. A method for actively reducing occlusion in a hearing apparatus, comprising:
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picking up a sound in an auditory canal via a microphone 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; measuring at least a portion of the transducer transmission function which is defined for a transmission path, the transmission path from the input of the receiver via the auditory canal to an output of the microphone; applying an automatic plausibility check to a transducer transmission function; and adjusting the adjustable filter subject to the transducer transmission function only when the transducer transmission function is plausible according to a predefined criterion.
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14. A hearing apparatus with active occlusion reduction, comprising:
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a receiver for emitting sound in an auditory canal; a microphone for receiving a sound in the auditory canal and for outputting a corresponding microphone signal; an adjustable filter for filtering the microphone signal, the filtered microphone signal being fed back to an input of the receiver; a transmission path from the input of the receiver via the auditory canal to an output of the microphone; a measuring device for measuring at least part of a transducer transmission function which is defined for the transmission path; a checking device for automatically checking the plausibility of the transducer transmission function; an adjusting mechanism for adjusting the adjustable filter subject to the transducer transmission function such that the adjustable filter is only altered by the adjusting mechanism only when the transducer transmission function is plausible according to a predefined criterion. - View Dependent Claims (15, 19)
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- 16. The hearing apparatus as claimed in claim 16, wherein the transducer transmission function is measured in a first frequency range and extrapolated in a second frequency range.
Specification