A METHOD AND PROCESSING UNIT FOR ADAPTIVE WIND NOISE SUPPRESSION IN A HEARING AID SYSTEM AND A HEARING AID SYSTEM

摘要

A processing unit that adaptively suppresses wind noise in a hearing aid isprovided.The processing unit comprises a first microphone and a second microphone. Theanalog signal from the first microphone is converted to a first digital signalin a firstA/D converter and the analog signal from the second microphone is converted toasecond digital signal in a second A/D converter. The output of the first A/Dconverteris operationally connected to a first input of a subtraction node. The outputof thesecond A/D converter is operationally connected to the input of an adaptivefilter. Theoutput of the adaptive filter is branched and in a first branch operationallyconnectedto the second input of the subtraction node and in a second branchoperationallyconnected to the input of the remaining signal processing in the hearing aid.Theoutput from the subtraction node is operationally connected to a control inputof theadaptive filter. The invention also relates to a hearing aid system havingsuch aprocessing unit and a method of adaptive wind noise suppression in a hearingaidsystem.