Patent ID: 7386135

Claim:
A system, comprising: an acoustic device having a plurality of acoustic elements designed and arranged to facilitate generation of a first signal that includes mostly undesired audio, substantially void of desired audio; a second signal that includes both the desired and the undesired audio; and a signal processing subsystem coupled to the acoustic device to extract the desired audio using the first and second signals; wherein said signal processing subsystem comprises a signal separation component eguipped to subtract the first signal from the second signal; wherein said signal processing subsystem further comprises a delay component to introduce a deterministic delay to said second signal; wherein said signal separation component comprises logic to employ an echo cancellation like technique to subtract the first signal from the second signal; wherein said signal processing subsystem further comprises an inhibit component to inhibit said signal separation component from performing at least one of signal filtering and adapting filtering; and wherein said signal processing subsystem further comprises a plurality of mean amplitude estimators and a comparator coupled to each other and to said inhibit component to provide said inhibit component with inputs for determining whether to inhibit said signal separation component from performing at least one of signal filtering and adapting filtering.