Dynamically configurable ANR signal processing topology

Details Dynamically configurable ANR signal processing topology Dynamically configurable ANR signal processing topology

2009-04-28

2011-12-06

Enad, Elvin G (Department: 2832)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

Reexamination Certificate

active

08073150

ABSTRACT:
In an ANR circuit, possibly of a personal ANR device, each of a feedback ANR pathway in which feedback anti-noise sounds are generated from feedback reference sounds, a feedforward ANR pathway in which feedforward anti-noise sounds are generated from feedforward reference sounds, and a pass-through audio pathway in which modified pass-through audio sounds are generated from received pass-through audio sounds incorporate at least a block of filters to perform those functions; and may each incorporate one or more VGAs and/or summing nodes. For each of these pathways, ANR settings for interconnections of each of the pathways, coefficients of each of the filters, gain settings of any VGA, along with still other ANR settings, are dynamically configurable wherein dynamic configuration is performed in synchronization with the transfer of one or more pieces of digital data along one or more of the pathways.

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