Patent ID: 8553917

Claim:
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.