Patent ID: 8073151

Claim:
A method of operating a dynamically configurable ANR circuit to provide ANR in an earpiece of a personal ANR device, the method comprising: incorporating a plurality of digital filters of a quantity specified by a first set of ANR settings into a filter block located along a pathway through which digital data associated with the provision of the ANR flows within the ANR circuit; selecting a type of digital filter specified by a first set of ANR settings for each digital filter from among a plurality of types of digital filter supported by the ANR circuit; adopting a filter block topology specified by the first set of ANR settings within the filter block by configuring interconnections among each of the digital filters; configuring each of the digital filters with filter coefficients specified by the first set of ANR settings; setting a data transfer rate at which digital data flows through at least one of the digital filters as specified by the first ANR settings; operating the filter block to enable the ANR circuit to provide ANR in the earpiece; and changing an ANR setting specified by the first set of ANR settings to an ANR setting specified by a second set of ANR settings in synchronization with a transfer of digital data through at least a portion of the pathway.