Patent Document ID: 9628923
Application ID: 14144474
Patent Flag: 1

Claim One:
1. A hearing aid comprising: a first input transducer for generating a first audio signal; a first feedback suppression circuit configured for modelling a first feedback path of the hearing aid; a first subtractor for subtracting a first output signal of the first feedback suppression circuit from the first audio signal to form a first feedback compensated audio signal; a hearing loss processor that is coupled to the first subtractor for processing the first feedback compensated audio signal to perform hearing loss compensation; and a receiver that is coupled to the hearing loss processor for providing a sound signal based on the processed first feedback compensated audio signal, wherein the first feedback suppression circuit comprises a first slow adaptive filter with an input coupled to the hearing loss processor, and an output, the first slow adaptive filter configured to model a first change of the first feedback path, and a first fast adaptive filter with an input coupled to the first slow adaptive filter, and an output, the first fast adaptive filter configured to model a second change of the first feedback path, the second change being a faster change compared to the first change, wherein filter coefficients of the first slow adaptive filter are based at least in part on a difference between an output signal of the first slow adaptive filter and at least one of an output signal of the first fast adaptive filter and the first audio signal.